Final answer:
A mineral is a naturally occurring, inorganic solid with a definite chemical composition and a characteristic crystalline structure. Examples include ice, cubic zirconia, and obsidian.
Step-by-step explanation:
A mineral is defined as a naturally occurring, inorganic solid with a definite chemical composition and a characteristic crystalline structure. Examples of minerals include ice (water in the solid state), cubic zirconia (a synthetic diamond substitute), and obsidian (a type of volcanic glass). Petroleum (oil) is not a mineral because it is a liquid.