minreal
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mineral
A substance that is formed naturally in the earth, is inorganic, has definite chemical composition and has a crystal structure.
streak
The color of a mineral’s powder when it is rubbed against a porcelain plate.
luster
they way the surface of a mineral reflect to light
inorganic
not derived from living matter.
crystal
A solid formation that follows a pattern.
harness
the ability of a mineral to scratch or be scratched by another mineral.
cleavage
the tendency of crystals and minerals to break along definite planes resulting in smooth surfaces.
fracture
the appearance of a freshly broken surface on a mineral that has a rough or irregular surface.
mohs hardness scale
A hardennes scale used to classify minerals.
formula
A set of chemical symbols showing the makeup of a chemical compound.