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Minerals•A mineral:
–occurs naturally–Is inorganic–Is solid–Has a crystal structure–Has a definite chemical composition
Minerals• There are 3000 minerals.
• 100 are common.
• 20 minerals make up most of the rock’s of Earth’s crust (rock-forming minerals).
Mineral Formation• Minerals form through:
•Crystallization of melted materials.
•Crystallization of materials dissolved in water.
Crystals• Repeating
patterns of a mineral’s particles that form a solid.
Minerals• All minerals contain certain
elements in definite amounts.• Most minerals are compounds
(two or more elements).• Silver and gold are considered
minerals.
Mohs Hardness Scale
The Mohs hardness scale ranks ten minerals from softest to hardest.
Talc 11Gypsum 2Calcite 33Fluorite 4Apatite 55Feldspar 6Quartz 7Topaz 8Sapphire 99DiamondDiamond 10
Magnetism
Magnetism occurs naturally in some minerals, such as magnetite.