properties of minerals. what is a mineral? a mineral is a naturally occurring, inorganic solid that...
DESCRIPTION
Luster Luster describes how a mineral reflects light from its surface. Such as: Description Examples GlassyQuartz SilkyGypsum GreasyTalc, some Quartz MetallicGold, Pyrite, Galena etc EarthyKaolin Waxysome Serpentine PearlyGypsum, some Talc Resinous Amber BrilliantDiamond DullGraphiteTRANSCRIPT
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PROPERTIES OF MINERALS
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What is a mineral?
A mineral is a naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition
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Luster
Luster describes how a mineral reflects light from its surface. Such as:
Description Examples Glassy Quartz Silky Gypsum Greasy Talc, some Quartz Metallic Gold, Pyrite, Galena etc Earthy Kaolin Waxy some Serpentine Pearly Gypsum, some Talc Resinous Amber Brilliant Diamond Dull Graphite
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Color The color of a mineral is a physical property that is easy to
observe.
Color can only be used for a few minerals that have their own specific color.
The color of a mineral alone does not usually give enough information to make a definite identification. Some minerals come in many colors
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Streak
Streak tells the color of a mineral’s powder. To find the streak of a mineral you rub the mineral against an unglazed tile called a streak plate.
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Magnetism
• Some minerals attract metals
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Effervescence
• Carbonate minerals are unstable when in contact with hydrochloric acid (HCl)
• They effervesce (fizz)
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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
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Hardness- Mohs Hardness Scale