Rock and Mineral Dictionary
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Rock and Mineral Dictionary |
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The specific gravity (abbreviated s.g.) of a material is a comparison of its weight with the weight of an equal volume of water. Specific gravity measures the density of a material.
Substances with a low specific gravity (like cork, which has a s.g. of 0.24) are not very dense; substances with a high specific gravity (like Gold, with a s.g. of 19.3) are very dense.
| Substance | SPECIFIC GRAVITY |
|---|---|
| Amber | 1.05-1.30 |
| Lucite | 1.19 |
| Jet | 1.30-1.35 |
| Quartz | 1.544-1.533 |
| Topaz | 1.62-1.64 |
| Ivory | 1.7-2.0 |
| Opal | 2.1 |
| Obsidian | 2.3-2.6 |
| Lapis lazuli | 2.4-2.9 |
| Moonstone | 2.56-2.62 |
| Aquamarine | 2.67-2.71 |
| Emerald | 2.67-2.78 |
| Coral | 2.68 |
| Turquoise | 2.6-2.8 |
| Amethyst | 2.63-2.65 |
| Pearl | 2.60-2.78 |
| Nephrite | 2.90-3.02 |
| Glass | 3.15-4.20 |
| Peridot | 3.27-3.36 |
| Jadeite | 3.35 |
| Azurite | 3.7-3.9 |
| Diamond | 3.52 |
| Chrysoberyl | 3.70-3.72 |
| Malachite | 3.75-3.95 |
| Sapphire | 3.99-4.00 |
| Ruby | 3.97-4.08 |
| Zircon | 3.90-4.71 |
| Hematite | 4.95-5.16 |
| Pyrite | 5.0-5.2 |
| Tantalite | 5.18-8.20 |
| Gold | 19.3 |
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Rock and Mineral Dictionary |
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