This is a listing of gemstones with their specific gravity Mohs hardness refractive index and gemstone family classification in alphabetical order.
It also features basic colour-coding based on the stone’s most identifiable colour.
|
Gemstone |
Specific Gravity |
Mohs Hardness |
Refractive Index |
Family |
|
Agate |
2.65 |
7.0 |
1.530 - 1.550 |
Quartz |
|
Alexandrite |
3.68 - 3.78 |
8.5 |
1.746 - 1.755 |
Chrysoberyl |
|
Almandine |
3.50 - 4.30 |
6.5 - 7.5 |
1.750 - 1.830 |
Garnet |
|
Amazonite |
2.55 - 2.76 |
6.0 - 6.5 |
1.518 - 1.526 |
Feldspar |
|
Amethyst |
2.65 |
7.0 |
1.532 - 1.554 |
Quartz |
|
Aquamarine |
2.63 - 2.91 |
7.5 - 8.0 |
1.567-1.590 |
Beryl |
|
Black Opal |
1.98 - 2.25 |
5.5 - 6.5 |
1.440 - 1.460 |
Opal |
|
Bloodstone |
2.65 |
7.0 |
1.535 - 1.539 |
Quartz |
|
Carnelian |
2.65 |
7.0 |
1.530 - 1.550 |
Quartz |
|
Cat's Eye Chrysoberyl |
3.68 - 3.78 |
8.5 |
1.746 - 1.755 |
Chrysoberyl |
|
Chalcedony |
2.65 |
7.0 |
1.544 - 1.553 |
Quartz |
|
Chrysoprase |
2.65 |
7.0 |
1.530 - 1.550 |
Quartz |
|
Citrine |
2.65 |
7.0 |
1.532 - 1.554 |
Quartz |
|
Demantoid |
3.50 - 4.30 |
6.5 - 7.5 |
1.880 - 1.900 |
Garnet |
|
Diamond |
3.00 |
10 |
2.4 |
Diamond |
|
Dravide |
3.03 - 3.25 |
7.0 - 7.5 |
1.610-1.661 |
Tourmaline |
|
Emerald |
2.63 - 2.91 |
7.5 - 8.0 |
1.560 - 1.605 |
Beryl |
|
Emerald (Brazil) |
3.03 - 3.25 |
7.0 - 7.5 |
1.610 - 1.640 |
Beryl |
|
Fire Opal |
1.98 - 2.25 |
5.5 - 6.5 |
1.430 - 1.460 |
Opal |
|
Garnet |
3.50 - 4.30 |
6.5 - 7.5 |
1.730 - 1.760 |
Garnet |
|
Green Quartz |
2.65 |
7.0 |
1.540-1.550 |
Quartz |
|
Grossular |
3.50 - 4.30 |
6.5 - 7.5 |
1.880 - 1.940 |
Garnet |
|
Heliodor |
2.63 - 2.91 |
7.5 - 8.0 |
1.570 - 1.600 |
Beryl |
|
Hessonite |
3.50 - 4.30 |
6.5 - 7.5 |
1.730 - 1.760 |
Garnet |
|
Indicolite |
3.03 - 3.25 |
7.0 - 7.5 |
1.610 - 1.640 |
Tourmaline |
|
Jadeite |
2.90 - 3.10 |
6.0 |
1.640 - 1.667 |
Jade |
|
Jasper |
2.65 |
7.0 |
1.540 - 1.550 |
Quartz |
|
Labradorite |
2.55 - 2.76 |
6.0 - 6.5 |
1.560 - 1.572 |
Feldspar |
cont... Lapis Lazuli to Zircon |
|
| |
