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Define mineral
Short answer
A mineral is a naturally occurring, inorganic, homogeneous solid with a definite chemical composition and ordered atomic structure, formed by geological processes. Rock-forming minerals are the few groups—dominantly silicates like quartz and feldspars—that constitute most crustal rocks, with silicates making up about 90%.
Define minerals (rock-forming minerals).
A mineral is a naturally occurring, inorganic, homogeneous solid with a definite chemical composition (or a narrow range) and a regular internal atomic structure, usually formed by geological processes. Example: quartz (SiO₂), calcite (CaCO₃).
Rock-forming minerals are the few mineral groups that make up most of the rocks of the Earth's crust, about 20-30 in number. The main ones are:
- Silicates: quartz, feldspars, micas, amphiboles, pyroxenes, olivine.
- Carbonates: calcite, dolomite.
- Others: clay minerals, gypsum, oxides.
Silicates alone make up about 90% of the crust.
✓ Answer checked by Claude Opus 5.5 (high effort)
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