Minerals are naturally occurring substances which have a homogeneous nature. The entirety of a mineral has the same chemical composition. Rocks, by contrast, are comprised of many different materials, some or all of which may not be minerals at all.
This category has only the following subcategory.
- [+] Crystals (1 C, 39 P)
The following 47 pages are in this category, out of 47 total.