See photos of rough and cut gemstones and learn about the chemistry of the minerals.
Agate | Amber | Alexandrite | Amethyst |
Amethyst | Amethyst | Ametrine | Aquamarine |
Azurite | Azurite | Beryl Crystal Photo | Beryl |
- Graphic Index
- Text Index
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From Anne Marie Helmenstine, Ph.D., About.com
Agate | Amber | Alexandrite | Amethyst |
Amethyst | Amethyst | Ametrine | Aquamarine |
Azurite | Azurite | Beryl Crystal Photo | Beryl |
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