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Mineralogy

Flashcards for mineralogy.

QuestionAnswer
What does hardness mean? The ability of a mineral to resist scratching.
What is the Mohs Scale of Hardness? A ranking of minerals from softest (1) to hardest (10).
What is luster? The way in which a mineral reflects light.
What are the two main categories of mineral luster? Metallic and non-metallic.
All minerals have a crystal structure. True or false. True.
What is a streak? The color of a mineral in powder form.
Why isn't color a good factor for identifying minerals? Multiple minerals exist in different colors.
What is cleavage in mineralogy? The tendency of a mineral to split along flat, smooth surfaces.
What is cleavage determined by? By the mineral's crystal structure.
Do all minerals have cleavage? No, not all minerals have cleavage.
Can a mineral be manmade? No, a mineral must be inorganic (not made by living organisms).
Is bone a mineral? No, a bone is organic, it was made from another living being.
Is water a mineral? No, it is a liquid,
What are the steps in testing a mineral's streak? 1. Place the streak plate flat surface and firmly hold it in place. 2. Firmly drag a mineral sample across the streak plate. 3. Observe the color of the streak on the plate. 4. Repeat if necessary.
What hardness do most streak plates have? 6.5 to 7.
Why can't diamonds be tested for streak? Diamonds have a hardness higher than the streak plate. Minerals that are harder than 6.5-7 have ''no streak'' or ''colorless streak''.
What does fracture mean? The manner in which a mineral breaks along an irregular surface.
Created by: bubbbleteaaa
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