PPT-Properties of Minerals Luster

Appearance of a fresh mineral surface in reflected light 1 Metallic Luster 2 Vitreous Luster glassy luster 3 Resinous Luster 4 Pearly Luster 5 Silky luster Pyrite Quartz Orpiment Muscovite. Cleavage Fracture. Color Streak Luster Hardness Heft. Cleavage. - mineral breaks evenly along a smooth, flat surface the cleavage plane. Cleavage. Minerals can have 1, 2, 3, 4 or 6 cleavage directions.. So what is a mineral?. What are the characteristics of all minerals?. Mineral . Characteristics. 1. A mineral occurs naturally.. 2. A mineral is solid.. 3. A mineral has a definite chemical composition.. Geologists use characteristics to tell one mineral from another. What is a Mineral?. Must be a solid.. Must occur in nature.. Must have a definable chemical composition (. NaCl. ).. Must have a crystalline structure.. MINERALS. How do they form. Minerals form when molten materials cools and hardens inside the Earth or on the surface.. Sometimes minerals from when solutions with solutes evaporate.. MINERALS. Occur naturally and are inorganic solids (not alive).. It’s ACT Day. You only need a pencil and eraser. If you finish early just sit there quietly, you made put your head down but MAY NOT get out phones or books.. We will be done approximately 2: 45. I want your opinion…. How to identify a mineral…. Questions for review…. Which of the following definitions best describes a MINERAL?. a. a substance that cannot be separated or broken down into simpler substances by chemical reactions. If you closed your eyes and tasted different foods, you could probably determine what the foods are by noting properties such as saltiness or sweetness. . You can also determine the identity of a mineral by noting different properties.. 1) Rocks cannot be made of organic material. 2) Luster is classified as metallic and non-metallic. 3) Scientist use tests to identify minerals. 4) Minerals that make up rocks can be mined as ores. 5) A liquid or gas can be classified as a mineral. A pure substance, such as a mineral, can be identified from observations and tests performed to determine its physical properties. These properties are based on the unique structure of the substance.. A pure substance, such as a mineral, can be identified from observations and tests performed to determine its physical properties. These properties are based on the unique structure of the substance.. What is a Mineral?. Must be a solid.. Must occur in nature.. Must have a definable chemical composition (. NaCl. ).. Must have a crystalline structure.. Must be inorganic.. Video: . http://www.youtube.com/watch?v=rTXSwnkieZc. Geo 281: geology for engineers. Geology and Geophysics Department. King Saud University. Minerals: Building. Blocks of Rocks. We begin our discussion of Earth . materials with . an overview of . mineralogy (mineral = mineral and Logy=Study) because . What are the physical characteristics used to distinguish between minerals & rocks?. SWBAT: Explain how scientists use physical characteristics to identify and classify minerals and rocks.. What is a mineral?. Understand how mineral crystals acquire their shape. Understand the characteristics that define a sample as a mineral. Understand that many minerals are composed of similar elements. Understand the connections between minerals and rocks and that many rocks contain similar minerals.