Gems Hardness & Density|
Gems Hardness & Density |
|
Gems
|
Hardness
|
Refractive Index
|
Density
|
|
Agate
|
6.5-7
|
1.53
|
2.61
|
|
Alexandrite
|
8.5
|
1.740-1.770
|
3.68-3.801
|
|
Amber
|
2-3
|
1.54
|
1.05-1.10
|
|
Amethyst
|
7
|
1.544-1.553
|
2.651
|
|
Ametrine
|
7
|
1.544-1.553
|
2.651
|
|
Apatite
|
5
|
1.630-1.645
|
3.10-3.35
|
|
Aquamarine
|
7.5-8
|
1.567-1.590
|
2.66-2.88
|
|
Beryl
|
7.5
|
1.560-1.602
|
2.62-2.90
|
|
Chalcedony
|
6.5-7
|
1.53 or 1.54
|
2.58-2.64
|
|
Chrome Diopside
|
5.5-6
|
1.671-1.702
|
3.17-3.32
|
|
Chrysoberyl
|
8.5
|
1.75 or 1.76
|
3.7-3.72
|
|
Chrysoprase
|
6.5-7
|
1.525-1.545
|
2.651-2.91
|
|
Citrine
|
7
|
1.544-1.533
|
2.651
|
|
Coral
|
2.5-4
|
1.49-1.65
|
2.60-2.72
|
|
Diamond
|
10
|
2.418
|
3.52
|
|
Emerald
|
7.5-8
|
1.571-1590
|
2.68-2.78
|
|
Garnet
|
6.5-7.5
|
1.880-1.895
|
3.4-4.3
|
|
Iolite
|
7-7.5
|
1.53 or 1.54
|
2.53-2.65
|
|
Jade
|
6.57
|
1.655-1.67
|
-
|
|
Kunzite
|
6.5-7
|
1.654-1.679
|
-
|
|
Lapis
|
5-6
|
1.50
|
2.38-2.42
|
|
Moonstone
|
6-6.5
|
1.52
|
-
|
|
Opal
|
5-6.5
|
1.42-1.47
|
-
|
|
Pearl
|
2.5-4.5
|
1.53-1.69
|
2.68-2.74
|
|
Peridot
|
6.5-7
|
1.640-1690
|
3.20-345
|
|
Quartz
|
7
|
1.544-1.553
|
2.651
|
|
Ruby
|
9
|
1.76 or 1.77
|
3.99-4.1
|
|
Sapphire
|
9
|
1.76 or 1.77
|
3.99-4.1
|
|
Spinel
|
7.5-8
|
1.715-1.747
|
3.55-3.63
|
|
Tanzanite
|
6.5
|
1.691-1.700
|
3.11-3.40
|
|
Topaz
|
8
|
1.607-1.649
|
3.50-3.57
|
|
Tourmaline
|
7
|
1.62-1.64
|
3.02-3.26
|
|
Turquoise
|
5-6
|
1.61-1.65
|
2.65-2.90
|
|
Zircon
|
6.5-7
|
1.78-2.01
|
4.00-4.80
|