|
  
Gemstone Properties
| Gemstone |
Specific Gravity |
Hardness |
Refractive Index |
|
Alexandrite |
3.71 -
2.75 |
8.5 |
1.74 -
1.75 |
|
Amazonite |
2.5
|
6 - 6.5 |
1.52 -
1.54 |
|
Amber |
1.05 -
1.07 |
2 - 2.5 |
1.54 |
|
Amethyst |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Ametrine |
2.64 -
2.68 |
7 |
1.54 -
1.55 |
|
Aquamarine |
2.67 - 2.9 |
7.5 - 8 |
1.57 -
1.58 |
|
Chalcedony |
|
Agate |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Black Onyx |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Carnelian |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Jasper |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Chrysoprase |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Chrysoberyl |
|
Cat's Eye |
2.54 -
2.64 |
6.5 - 7 |
1.53 -
1.54 |
|
Alexandrite (Yellow, Brown, Green) |
2.54 -
2.64 |
6.5 - 7 |
1.53 -
1.54 |
|
Coral |
|
Black |
3.5 - 4 |
3.5 |
1.48 -
1.65 |
|
White |
3.5 - 4 |
3.5 |
1.48 -
1.65 |
|
Pink |
3.5 - 4 |
3.5 |
1.48 -
1.65 |
|
Gold |
3.5 - 4 |
3.5 |
1.48 -
1.65 |
|
Red |
3.5 - 4 |
3.5 |
1.48 -
1.65 |
|
Emerald |
2.67 - 2.8 |
7.5 - 8 |
1.57 - 1.6 |
|
Garnet |
|
Almandite |
3.95 -
4.25 |
7.25 - 7.5 |
1.78 -
1.83 |
|
Demantoid |
3.81 -
3.87 |
6.5 - 7 |
1.88 -
1.89 |
|
Pyrope |
3.51 - 3.8 |
7.25 |
1.71 -
1.75 |
|
Rhodolite |
3.8 - 3.95 |
7.25 |
1.75 -
1.78 |
|
Tsavorite |
3.57 -
3.64 |
7.25 |
1.74 -
1.76 |
|
Hematite |
5.2 - 5.3 |
5.5 - 6.5 |
2.94 -
3.22 |
|
Iolite |
2.56 -
2.66 |
7 - 7.5 |
1.53 -
1.58 |
|
Jade |
|
Jadeite |
3.3 - 3.36 |
6.5 - 7 |
1.66 -
1.68 |
|
Green, white & purple (Nephrite) |
2.9 - 3.05 |
6 - 6.5 |
1.66 -
1.68 |
|
Lapis Lazuli |
2.7 - 2.9 |
5 - 5.5 |
1.5 |
|
Malachite |
3.6 - 4 |
3.5 - 4 |
1.65 |
|
Moonstone |
2.54 -
2.63 |
6 - 6.5 |
1.52 -
1.54 |
|
Opal |
|
white & black |
1.98 - 2.2 |
5.5 - 6.5 |
1.44 -
1.47 |
|
Boulder |
1.98 - 2.2 |
5.5 - 6.5 |
1.44 -
1.47 |
|
Fire Opal |
1.98 - 2.2 |
5.5 - 6.5 |
1.44 -
1.47 |
|
Pearl |
|
Natural |
2.6 - 2.78 |
2.5 - 4.5 |
1.53 -
1.69 |
|
Cultured |
2.72 -
2.78 |
2.5 - 4.5 |
1.53 -
1.69 |
|
Peridot |
3.27 -
3.45 |
6.5 - 7 |
1.64 -
1.69 |
|
Quartz |
|
Aventurine |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Citrine |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Rock Crystal |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Rose Quartz |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Smoky Quartz |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Tiger's eye |
2.64 -
2.66 |
7 |
1.54 -
1.55 |
|
Rhodonite |
3.74 -
3.94 |
7 - 7.5 |
1.65 -
1.69 |
|
Ruby |
3.95 -
4.05 |
9 |
1.76 -
1.78 |
|
Sapphire |
3.95 -
4.05 |
9 |
1.76 -
1.78 |
|
Spinel |
3.57 -
3.63 |
8 |
1.71 -
1.73 |
|
Tanzanite |
3.2 - 3.4 |
6 - 7 |
1.69 - 1.7 |
|
Topaz |
|
Blue |
3.5 - 3.57 |
8 |
1.61 -
1.64 |
|
Yellow/ Orange |
3.5 - 3.57 |
8 |
1.61 -
1.64 |
|
Tourmaline |
|
Green, Blue |
3 - 3.26 |
7 - 7.5 |
1.62 -
1.65 |
|
Pink, Red |
3 - 3.26 |
7 - 7.5 |
1.62 -
1.65 |
|
Yellow/ Orange |
3 - 3.26 |
7 - 7.5 |
1.62 -
1.65 |
|
Bicolored |
3 - 3.26 |
7 - 7.5 |
1.62 -
1.65 |
|
Turquoise |
2.6 - 2.85 |
5 - 6 |
1.61 -
1.65 |
|
Zircon |
|
Blue |
3.9 - 4.8 |
6 - 6.5 |
1.78 -
2.01 |
|
Green |
3.9 - 4.8 |
6 - 6.5 |
1.78 -
2.01 |
|
Yellow |
3.9 - 4.8 |
6 - 6.5 |
1.78 -
2.01 |
|
Colorless |
3.9 - 4.8 |
6 - 6.5 |
1.78 -
2.01 |
|
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