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GEMSTONES
Composition of the Earth | Global Statistics | Glossary | Geological Periods
Gemstones are minerals that have a rarity or aesthetic value.
| Name | Colour |
| Agate | Opaque to pale grey |
| Alexandrite | Green |
| Amethyst | Purple |
| Aquamarine | Pale limpid blue |
| Bloodstone | Dark green & red spots |
| Cairngorm | Smokey yellow/brown |
| Cats Eye | Yellow/brown, green |
| Chrysoprase | Apple green |
| Cornelian | Red to yellow brown |
| Diamond | Bluish white, red |
| Emerald | Vivid green |
| Garnet | Purplish red |
| Jade | Dark to leek green |
| Jasper | Red to yellow, opaque |
| Lapis Lazuli | Deep azure blue |
| Moonstone | Blue/white iridescent |
| Obsidian | Green or yellow brown |
| Onyx | Banded agate |
| Opal | Rainbow sheen on white |
| Peridot | Green |
| Rock Crystal | Colourless |
| Rose Quartz | Granular pale pink |
| Ruby | Red |
| Sapphire | Dark blue |
| Sardonyx | Banded agate |
| Spinel | Red |
| Topaz | Tea coloured |
| Tourmaline | Deep green, red |
| Turquoise | Sky blue |
| Zircon | Colourless |
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