 |
| Gypsum is found in nature in mineral and rock form. As a mineral, it can form very pretty, and sometimes extremely large, crystals. |
 |
| Pumice is a type of extrusive volcanic rock, produced when lava with a very high content of water and gases is extruded from a volcano |
 |
| Amethyst is a violet variety of quartz |
 |
| Galena, highly reflective and commonly in cubes. |
 |
| Halite is the native salt, occurring in massive, granular, compact, or cubic-crystalline forms. |
 |
| Feldspar, found in abundance on Earth's crust. |
 | ||
| Amphibole, a variety of hornblende from Faraday Township, Ontario, Canada. Specimen is approximately 3 inches across. |
No comments:
Post a Comment