A naturally-occurring, inorganic solid that has a crystal structure and a definite chemical composition.
Not formed from living things or the remains of living things.
A solid in which the atoms are arranged in a pattern that repeats again and again.
The color of a mineral's powder.
The way a mineral reflects light from its surface.
Mohs hardness scale
A scale ranking ten minerals from softest to hardest; used in testing the hardness of minerals.
A mineral's ability to split easily along flat surfaces.
The way a mineral looks when it breaks apart in an irregular way.