Solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Not formed from living things or the remains of living things.
The appearance of objects (or light sources) described in terms of a person's perception of their hue and lightness (or brightness) and saturation. This is a very unreliable way to identify minerals due to the impurities the minerals may be exposed to.
The color of a mineral in powdered form. This is a very reliable way in which to identify minerals.
The way a mineral reflects light.
A measure of the ability of a mineral to resist scratching.
The tendency of a mineral to break along flat surfaces
The manner in which a mineral breaks along either curved or irregular surfaces
Mohs Hardness scale
A scale ranking ten minerals from softest to hardest used in testing the hardness of minerals
An unglazed piece of porcelain used to identify a mineral's streak, or true color.