Properties of minerals ppt

Properties of minerals ppt. Others - there are certain unique properties of minerals that actually help in their identification (e. Classification of Minerals • Major minerals - required in amounts greater than 100mg a day - sometimes called “macrominerals” • Trace Aug 4, 2012 · Properties of Minerals. Fingernail is 2 to 2. 13 Identifying Minerals Each mineral has its own specific properties that can be used to identify it. 13. Topic 2 minerals. Minerals range in Title: PHYSICAL SCIENCE 120 PHYSICAL PROPERTIES OF MINERALS 1 PHYSICAL SCIENCE 120PHYSICAL PROPERTIES OF MINERALS. May 10, 2020 · Minerals have distinct chemical compositions and properties including color, streak, luster, hardness, cleavage, diaphaneity, and magnetism. by DepEd Resources. 5; hammer is about 5. Streak the color of a minerals powder. 15. Slide Nov 29, 2018 · Hematite is one of the most abundant minerals on Earth's surface and in the shallow crust. Presentation on theme: "Properties of Minerals"— Presentation transcript: 1 Properties of Minerals Geologists use characteristics to tell one mineral from another Oct 25, 2022 · Physical properties which alludes to its color, streak, hardness and many more characteristics shall be used identify a myriad of rocks. 8. luster or a non-metallic luster. 9. The specific gravity of most minerals ranges from 1. The colors are caused by small amounts of different elements. Minerals are always solid with particles in repeating patterns- crystals They are only found in Nature. This resource includes a 16 slide PowerPoint presentation and 2 versions of the student notes pages - full size and interactive notebook format (modified notes also included). sciencepowerpoint. This worksheet explains that rocks are made up of minerals and explains the different physical properties that can be used to identify different minerals. The scope of this module permits it to be used in many different learning situations. 3 Properties of Minerals Properties of Minerals In Gem and Mineral Hall Observe the displays in the Basics of Mineralogy section, and use them to answer the following questions. Mineral Series. Minerals are classified by their properties Some are easy to study, other require equipment Determined by the chemical composition and crystalline structure Properties Color Streak Luster Cleavage & Fracture. These minerals make up most of the rocks found in the Earth’s crust. Specific Gravity Secondary Techniques- 1. Sixth Grade Science teacher. 5 habit short prismatic crstal,massive often cubic crystal,massive use improtant ore of copper important ore of lead and silver cleavage poor perfect cubic Minerals have definite crystalline structures and chemical compositions that give them unique sets of physical and chemical properties shared by all samples of that mineral. Talc used as an ingredient in ceramics, paper, paint, roofing, plastics, cosmetics, talcum and baby powders, and a variety of other assorted uses such as making rubber and plastics. Feel 3. a group of minerals forming the natural salts and include fluorite, halite, sylvite and sal ammoniac. 6. Ž‘u ' ppt/slides/slide20. Download Now. Ore deposit classification (1). Properties of Minerals: Why do we care? Property – characteristic, quality or trait of MINERALS A mineral is a naturally occurring solid formed through geological processes that has a characteristic chemical composition, a highly ordered atomic structure, and specific physical properties. Colour The most significant control on colour is a minerals chemical composition. Minerals. Why we need to know the principles of chemistry in a minerals course: Minerals are chemicals that function in a biological setting. the largest, the most interesting, and the most complicated class of minerals. minerals_and_rocks. Specific studies within mineralogy include the processes of mineral origin and Minerals with higher numbers will scratch minerals below The last three are not common minerals. Ten critical elements found in most rocks and soils. Apr 23, 2023 · Some of the common physical properties of minerals include: Hardness: Hardness refers to the ability of a mineral to resist scratching. Most olivine are found at earth’s surface is in dark-colored igneous rocks. Physical properties are any features that you can use your 5 senses (see, hear, feel, taste or smell) to aid in identifying an unknown mineral. Colour 2. The major physical properties will be discussed May 18, 2016 · Properties of Minerals Earth Science Lesson PowerPoint, Lab Activity www. intermediate igneous rocks containing between 52 - 63% SiO. The minerals are olive green or brown in color. 4. fluorite 9. Mineral Naturally occurring Can occur/be made naturally in the wild Inorganic Not made up of living things, or the remains of living things. Minerals are inorganic not made from a living thing. They are: 1) naturally occurring, 2) inorganic, 3) solids, 4) with a definite chemical composition, and, 5) an ordered internal structure. This file contains the information regarding Lecture 3 Slides: Introduction to Minerals. diamond • glass and knife = 5. 5 • penny = 3 • some minerals have more than actual properties, all feldspar minerals have a glassy shine that is, for the most part, magnificent on group faces. Magnetism - indicates the ability of a mineral to attract or repel other minerals. 58 likes • 25,600 views. Apr 23, 2023 · Pyroxene is a set of essential rock-forming inosilicate minerals discovered in many igneous and metamorphic rocks. Naturally occurring, · 2. quartz • 3. Feb 23, 2015 · Minerology ppt. 1 of 29. Luster - the character of the light reflected. Jul 5, 2017 · NATURAL RESOURCES • Rich deposits of metallic minerals such as iron, nickel, copper, gold, silver, chromium, zinc and lead are also located. Download to read offline. 7. Hardness 6. 2 (pg. Pyroxene is a component in many igneous and metamorphic rocks. Quartz Quartz makes an excellent gemstone. Physical Properties Of Minerals 9. Physical properties of minerals. Introduction to Minerals The building blocks of rocks. Enduring Understanding • An object’s characteristics and behavior are determined by its individual particles and their arrangement. Wells, Science 2. 10 likes • 4,746 views. It's super funny and has lots of cartoony rocks and minerals, so your lesson can focus on this subject. May 16, 2015 · 1. pptx. ) occur naturally , formed by nature, not by man 2. Mohamed _el_shora Follow. It is possibly the first mineral ever named ending with a "-ite" suffix. Minerals PowerPoint Notes. 5 - 6 • steel file = 6 -7 • fingernail = 2. This module was designed and written with you in mind. the different Rock forming minerals. ppt. LECTURE 1: Origin of Elements and Composition-Structure of the Earth. Jul 25, 2014 · Minerals and Rocks. G. 5. 9 Relative Density* Relative to an equal volume of distilled water at 4 degrees centigrade. . Feb 20, 2023 · Properties_of_Minerals (1). From common minerals like quartz and feldspar to rare gems like diamonds. Duluth Middle School. Although aluminium substitutes extensively for silicon in silicates consisting of feldspars and amphiboles, the substitution occurs only to a confined extent in most pyroxenes. Rocks and Minerals is an Earth Science unit that includes engaging resources for your students to master topics. Tenacity - level of resistance or reaction of minerals to stress such as crushing, bending, breaking, or tearing. Jul 27, 2014 · Properties of Minerals The properties of a mineral depend on its composition and structure. Most common minerals belong to the silicate, oxide, hydroxide, or sulfide and sulfosalt classes. Atomic structure controls which components of. What is a mineral? A mineral is a naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition 5 Characteristics that all minerals share Naturally occurring Inorganic Solid This product contains an 18 slide instructional PowerPoint presentation on minerals. Oct 23, 2014 · Pyroxene Pyroxenes (Figure 7) are a family of silicate minerals. Properties of Minerals Chapter 2 – A free PowerPoint PPT presentation (displayed as an HTML5 slide show) on PowerShow. Lecture Outline. Non-metallic particles tend to reflect most of the light so they appear lighter in color or almost white Streak is a more Dec 1, 2021 · Physical properties of Minerals Primary techniques- 1. () 2 TABLE OF CONTENTS Physical Science 120 students are required to do pages 1 54. the naked eye in reflected light. some geologists estimate that 90% of the Earth's crust is made up of silicates. Naturally Occurring. Inorganic • The mineral cannot arise from materials that were once part of a living thing • Coal occurs naturally in the Earth’s crust, but it comes from the remains of plants and animals that lived millions of years ago. are often dark in colour. white light are absorbed or reflected. ppt ssuserdf29f0 Rocks and minerals for grade 11; Earth and life sciences Aug 8, 2014 · Hardness • Moh’s hardness scale is a special list of minerals with increasing relative hardness • 1. apatite 10. Unit – 2 Mineralogy. There might be future geologists among your students. • A cycle is a repetitive and predictable relationship. Minerals have a crystalline, geometric structure. Quantum theory gives us insight into the electronic structure of atoms and allows us to rationalize the biological behavior of minerals. that has a crystal structure and a definite. 3 Major Properties. 5 megagrams per cubic metre, or grams per cubic centimeter. The specific gravity (SG) is calculated from weight in air divided by loss of weight in water, expressed in units of grams per cubic centimetre. The most common minerals in Earth's crust can often be identified in the field using basic physical properties such as color, shape, and hardness. A mineral may have a metallic. All these minerals crystallize in orthorhombic system. Minerals Inorganic element needed by the body for the following functions: Build tissues Regulate body fluids Assist in body functions Help form body structures Remains as ash when food is burned. Thompson's Earth Science Class. Target #12- I can state how minerals are classified. Essentially, contaminants in the crystal form of the mineral. 1 to about 1. Six Common Rock-Forming Minerals. This is an extraordinary approach to recognizing feldspar minerals. 38. Minerals Mania Webquest. Physical Properties of Minerals. Silicate. The context of a mineral is important, too – some minerals can form under the same conditions, so you are likely to find them in the same rock, while Jan 2, 2020 · Properties of Minerals Geologists use characteristics to tell one mineral from another. For example, talc has a hardness of 1, while diamond, the hardest mineral Minerals have definite crystalline structures and chemical compositions that give them unique sets of physical and chemical properties shared by all samples of that mineral. feldspar • 2. Mineralogy. Mineral Formation • Growth depends on: 1) What atoms are available in the surrounding area 2) How fast atoms can migrate to the crystal 3) Temperature and Pressure conditions of the surrounding area • Slower cooling allows for bigger crystals • Different minerals crystallize from the same solution at Dec 9, 2018 · 3. P. mineral chalcocite galena formula cu2s pbs colour dark gray to black lead gray and silver lusture metallic bright metallic streak shiny black to lead gray lead gray hardness 2. from the mineral. Igneous rock ppt. Sulfate. It is here to help you master the properties of minerals. Because a mineral’s internal structure and chemical Nov 20, 2020 · 12 MINERALOGY The study of minerals and their properties (chemical and physical). Properties of Rocks Rock: Aggregated solids of minerals is called rock All rocks are made of 2 or more minerals, but minerals are not Chemical classification. Jan 2, 2013 •. Feb 21, 2017 · In order for something to be classified as a mineral, it must meet five (5) criterion: Minerals are: · 1. ) have a crystalline structure- the. 2 and plate glass is 5. The Mohs scale of hardness, which ranges from 1 (the softest) to 10 (the hardest), is commonly used to measure the hardness of minerals. Streak 4. com Economic geology - Metamorphic ore deposits Name that Mineral Quiz, Earth Science Lesson PowerPoint, Geology, Minerals The chemical formula for Torbernite is "Cu (UO 2 ) (PO 4) 2 · 8-12H 2 O". They are formed in the Earth’s mantle (from heat and pressure) – near the surface when oxygen, calcium and carbon combine in the ocean, and when hot, mineral-rich water moves slowly through the cracks in the Earth Feb 1, 2012 · 2. These topics include: what is a mineral, properties of minerals, identifying minerals, what are rocks, types of rocks, igneous rocks, sedimentary rocks, metamorphic rocks, and the rock Sep 15, 2010 · Ore deposit classification (1). Naturally occurring – not manufactured. • Structures that change over time do Aim: How do minerals form? Do Now: 1) What is the smallest thing on Earth? 2) What is the largest thing that you know of? Of the almost 4000 known minerals, only about 30 are common. The language used recognizes the diverse vocabulary level of students. Properties of Minerals lesson- includes ppt, worksheets, and activity 4. Properties of Minerals Earth’s Surface 2. calcite 8. gypsum 7. ColorColor * most easily observed Need a ready to go lesson on the properties of minerals?! This 13 slide PPT is jam packed with pictures, definitions, and examples that cover the different mineral properties and tests. 14. Rock = Σ minerals. Jan 3, 2013 · Ore Microscopy 2012. List the minerals used to demonstrate each property in Mar 3, 2018 · Physical Properties of Menirals. Ex Malachite is always green Azurite is always blue. Nov 8, 2023 · The optical properties of minerals refer to their behavior in the presence of light and how they interact with light when observed using various optical techniques. 12 of 55. Earth and Life Science Quarter 1 – Module 3: Minerals. Aug 12, 2017 · Physical properties of crystals or minerals. Mineral = inorganic crystalline structure. 1 Physical Properties of Minerals In addition to the “characteristics” of minerals which are required for a substance to be a mineral, there are “physical properties” that help us determine which mineral is which. 1 litre = 1000g (1kg) 1 cubic centimetre = 1g Controlled by the atomic weight of the constituent atoms (chemical composition) and the packing (atomic structure) A useful property for identifying metallic ore minerals, these usually have relative densities over 5. Inorganic, · 3. By Rusty Sturken. 4 The structure of quartz is built from SiO4 tetrahedra which are linked by sharing each corner with another tetrahedron. 11. Minerals rich in Fe, Ti, Ni, Cr, Co, Cu and Mn. 5 Characteristics of a Mineral. PHYSICAL PROPERTIES OF CRYSTALSMINERALS. Rock-Forming MineralsRock-Forming Minerals Minerals make up the Earth’s crust * over 2000 minerals known. 5. Identification byIdentification by InspectionInspection simple observations made by looking * Color * Luster * Crystal System (shape) 6. Topaz Used as a gemstone in jewelry. It describes several key properties of minerals including their crystal form, habit, cleavage, parting, inclusions, and twinning. 51-57) Ms. Nov 1, 2013 · Presentation Transcript. 1. As you view the PHS 120 Power Points you will be prompted to advance to the next slide when you see this symbol (). You just need to encourage them a little bit! In order for them to love your Science classes, we think this template can be a great resource. Crystal Shape 7. Haematite, Kidney Ore. LECTURE 2: Physical Properties of Minerals I. Optical Properties of Minerals GLY 4200 Fall, 2014. chemical composition. Feb 15, 2012 · 1. 5 up to 19. Mineral Definition. OF MINERALS. Mar 16, 2019 · Minerals and Rocks. 479 views • 19 slides A comprehensive 83-slide PPT product that introduces all major topics in a typical middle school / early high school unit on minerals, rocks and the rock cycle. These properties are determined by a mineral's composition and crystalline structure. Jan 17, 2013 · Minerals are obtained by natural processes. 5cm. Mar 17, 2019 · Introduction to Minerals The building blocks of rocks. The 8-12H 2 O indicates that there can be 8 to 12 water molecules for every Cu (UO 2 ) (PO 4) 2 molecule. Kenyon. Mighty Minerals Project. Have a definite chemical composition – may be a single element or combination. 14 Hardness- Mohs Hardness Scale Hardness (how hard a mineral is) is one of the best properties that can be used to help identify a mineral Mohs Hardness Scale ranks 10 minerals from softest to hardest, Talc is softest and Diamond is hardest Each mineral has characteristic properties that can be used to identify it. In fact, over 60% of the Earth’s crust is made up of the family of minerals known as feldspar! 14 of 55. Aug 11, 2017 · Physical Properties of Minerals 7. 16. Because a mineral’s internal structure and chemical Free Google Slides theme and PowerPoint template. Properties of Minerals. CONTENTS • INTRODUCTION • PROPERTIES • IMPORTANT PHYSICAL PROPERTIES • CONCLUSIONS • REFRENCE. • Our biggest lead deposits are found in Ayala, Zamboanga. Luster - refers to the reaction of a mineral to light. The most common are quartz,feldspar,mica, and calcite. Definitions, Properties, Chemical characteristics. Determined by the atomic structure of the mineral. 10. Do your students know the different types of minerals there are? No? One more thing to teach them! This template, whereas it comes with dark backgrounds, offers an assortment of illustrations of minerals that really stand out. For example, all specimens of halite have the same hardness, the same density, and break in a similar manner. For example, coal density ranges from about 1. Minerals NH State Mineral: Beryl NH State Gem: Smokey Quartz. mineralogy felspar group of mineral. A mineral is a naturally occurring, solid crystalline substance, generally inorganic, with a specific chemical composition. Pyroxenes form short or columnar prismatic crystals. 2. Jul 29, 2014 · Properties of Minerals. Properties of Minerals Minerals must : 1. Mar 26, 2014 · 5. Oct 14, 2017 · The commonly associated minerals are amazonite -a variety of microcline, tourmaline, wolframite, pyrite, rutile, zeolites, fluorite, calcite, gold, muscovite, topaz, beryl, hematite and spodumene. Hardness - the resistance of a mineral to. Educational Value Statement Engineering Geology Fall 2016. It is a hard silicate mineral which occurs in many rocks but it is especially common in some metamorphic rock like schist. Apr 6, 2013 · Presentation Transcript. xmlìX[nã6 ý/Ð= ´À8’lÅ/Ä 8²= é¤I óMK´M Eª$åG‹ º‰ö¯ ÝG—Ò t ½—’ìØÉ )æù ¨+òò> /Åsò Aug 28, 2022 · The IMA officially recognizes more than 5,500 minerals (5,650 as of December, 2020). 438 views • 9 slides Jan 15, 2014 · minerals - download as a pdf or view online for free. Streak Streak is the color of the mineral in powdered form The streak of metallic minerals tends to appear dark because the small particles of the streak absorb the light hitting them. A number of minerals contain a varying amount of two or more elements. = 2. ppt - Download as a PDF or view online for free Oct 12, 2014 · Chemical Properties of Minerals II Basic Coordination Chemistry. basic igneous rocks have low silica 45 - 52% and typically high iron - magnesium content ultrabasic igneous rocks with less than 45% silica. 5, Cu penny is around 3. • Mercury reserves are located in Albay and Palawan. ROCKS & MINERALS. Color can be used to identify only those few minerals that always have their own characteristic color. Physical Properties of Minerals • Cleavage (1 direction): Example: mica. Have known chemical compositions · 4. characteristic chemical composition. Minerals • There are about 3000 known minerals • Minerals are made of elements (either a single element or a combination of elements) • Examples of Minerals • Gold: a mineral made of one element (goldAu) • Calcite: a mineral made of 3 elements (calcium, carbon, and oxygenCaCO3) calcite gold Sep 4, 2014 · Crystal faces are just on the surface and may not repeat when the mineral is broken. August, 2010. Pyroxenes have the general components is XY (Si,Al)2O6. Smell. – reaction with hydrochloric acid (calcite fizzes) • Other properties: – taste (halite tastes salty) – feel (talc feels soapy, graphite feels greasy) – magnetism (magnetite attracts a magnet) 55. A mineral must be/have. Colour 3. mineral A naturally occurring, inorganic solid. Color, for example, is usually caused by electromagnetic radiation interacting with a mineral's electrons. The unit follows this suggested pacing guide: Day 1: Teacher Demo - Sweet Rock CycleSection 1: Properties of Minerals PowerPoint, Notes, and Interactive Notebook (Traditional or Digital)Day 2: Section 1: Mini-quiz or Digital . Rocks and Minerals 8th Grade Earth Science Unit 2 Topics: Rocks, Minerals, Rock Cycle. 6 Identifying Minerals. A rock, by comparison, is an aggregate of minerals and/or mineraloids and need not have a specific chemical composition. This document provides information on the optical and physical properties of various mineral samples. talc 6. Dec 8, 2018 •. The Physical Properties Of Minerals WJEC AS Geology I. It determines how brilliant or dull the mineral is. What are minerals? Common rock-forming minerals Physical properties of minerals Basic rock types The rock cycle. Coal is slightly denser than water and significantly less dense than most rocks and mineral matter. Physical Properties of Minerals • Cleavage is described by: • Number of planes • Angles between adjacent planes • These are constant for a particular mineral. 0 and feel particularly dense when hefted Minerals are materials that meet five requirements. Minerals . These properties of feldspar minerals which are generally predictable in all types, are really helpful when the feldspar gems to be recognized are tiny. One common natural process that forms minerals is the crystallization of magma. Taste 2. Feb 15, 2013 · Mr. Are solid · They are usually (although not always) crystalline. Identifying minerals by physical properties. Nov 15, 2014 · Presentation Transcript. INTRODUCTION Garnet is a group of six minerals which are isomorphous in nature and never occur pure as represented by their chemical composition. Navigate through the slides and adapt its GEOE 213 Mineralogy Lecture Notes. The garnets vary only slightly in physical properties and some of the Mar 20, 2008 · Minerology ppt. Color • Minerals often occur in more than one color. Solid • A mineral is always solid, with a definite volume and shape. Minerals are solids. Title: Properties of Minerals 1 Properties of Minerals 2 What is a Mineral? Minerals are formed in nature. Mineral tests included: color, hardness, streak, luster, cleavage, fracture, special properties, and specific grav Jul 11, 2018 · Examples of rock-forming minerals: Topaz Quartz Talc Pyrite. Shivam Jain Follow. topaz • 4. Nov 14, 2012 · 1. These properties include transparency/opacity, color, luster, refractive index (RI), pleochroism, birefringence, dispersion, extinction, and crystallography. Crystalline solid – atoms have specific arrangement or crystal structure. About 2000 minerals and 100 chemical elements. g. This occurs because certain elements can substitute for others of similar size without changing the mineral PROPERTIES. Scholastic Mineral Video. Cleavage and fracture 5. It is a ratio between the weight of a mineral and the weight of an equal volume of water. LECTURE 3: Chemical Properties of Minerals. Originally named about 300-325 BCE by Theophrastus from the Greek, "αιματίτις λίθος" ("aematitis lithos") for "blood stone". Color - the color of the mineral as it appears to. is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. ) form from an inorganic process- from things that were never living 3 . magnetism,odor, taste, tenacity, reaction to acid, etc. • Gold is the precious metal which can be found pure in nature. ) Chemical Properties of Minerals - another way of identifying and classifying minerals is according to their composition. 1, knife is 5. Chapter 2, Section 1. Write the definition of the following properties of minerals: Color: Streak: Luster: Hardness: Cleavage: 2. Mineral physical properties are generally organized in a mineral key and the proper use of this key will allow you to name your unknown mineral sample. 65. • A crystal may be defined as a solid polyhedral form of a substance bounded by smooth geometrical surface called faces • Crystal word comes South Carolina Department of Natural Resources Chemical Properties of Minerals. AI-enhanced description. Pyroxene crystals are commonly faceted as gemstones. Introduce Properties of Minerals (hardness, luster, streak, crystal structure, color, cleavage, and fracture) with this PowerPoint presentation. Halide. Therefore, color by itself is not useful in identifying a mineral. Colour 1 8cm • Determined by the chemical composition of the mineral • Minerals rich in Al, Ca, Na, Mg, Ba and K are often light coloured • Minerals rich in Fe, Ti, Ni, Cr, Co, Cu and Mn are often dark in colour Haematite, Kidney Ore. 438 views • 9 slides Aug 15, 2023 · Knowing the physical properties of coal is important in the preparation and use of coal. 13 of 55. This product is also part of my Ultimate Science Bundle which contains 6 separate products for a discounted price! Topics addressed in this slideshow are: characteristics of minerals, color, luster, texture, streak, and hardness. Click on the link below to find the template for the. Have definite physical properties. Education. acid igneous rocks containing a high silica content, greater than 63% SiO. ) be solid- tightly packed particles 4. classified as a mineral. 441 views • 19 Nov 14, 2023 · Mineral color rock properties ppt identification minerals powerpoint presentation identify chemicalMinerals notes powerpoint properties preview Minerals properties ppt mineral powerpoint presentation optical composition depend structure its slideserveProperties of minerals. 3. Path Differences In Crystals • Waves entering an anisotropic crystal will generally experience two indices of refraction in two perpendicular directions • Even plane-polarized radiation will be split into the Ordinary (O) and Extraordinary (E) vibrating . Some minerals are chemical compounds having compositions that can be expressed by a chemical formula. Under ideal conditions = crystals. Color come in many different colors ; Luster the way a surface reflects light Dec 9, 2018 · Felspar group. A mineral:A mineral: is a naturally occurring inorganic crystallineis a naturally occurring inorganic crystalline solidsolid has an ordered internal arrangement of atomshas an ordered internal arrangement of atoms has specific physical properties that are eitherhas specific physical properties that Bundle. Students can test their knowledge of rocks and minerals by answering the questions provided on the last page. Pyroxene minerals generally contain magnesium, iron, calcium and aluminium as well as silicon and oxygen. Dec 10, 2015 · Mineralogy is the study of minerals and their properties. Lusture 2. Mineral Criteria. Definitions. Homogeneous substance, definite chemical composition, definite internal structure. Dec 15, 2016 · 54. A substance must have all 5 characteristics to be. com - id: 71c5f3-ZDAxY Jun 17, 2020 · This is a group of rock-forming silicates that are typically found in mafic and ultramafic igneous rocks such as basalt, gabbro, dunite, diabase and peritodite. Lecture Notes | Figures. About half are named after people, the rest mostly have names that refer to discovery locations, chemical compositions, or to mineral properties. corundum • 5. Physical Properties Quartz Crystal Shape Hexagonal Luster Nonmetallic (Vitreous) Color Clear to Milky Streak No Streak Hardness H = 7 Cleavage No Cleavage Fracture Conchoidal Specific Gravity S. Rocks and minerals are formed in sedimentary layers of sand and mud and in the folding of those layers deep in the Earth, where they are exposed to high pressures and temperatures. Download File. 5-3 2. bz it oc ut gs is ec cy lw oz