Spesific Gravity Table Of All Stone
The specific gravity of all stones divided into six groups, as below :
See :
Group A.
Isolates gems with a specific gravity of 4.7963 and over 4.70; in this group is placed zircon, with a specific gravity of from 4.70 to 4.88.
Group B.
Stones whose specific gravity lies between 3.70 and under 4.7963.
Garnets, many varieties. See Group D below.
Almandine 4.11 and occasionally to 4.25
Ruby 4.073 and occasionally to 4.080
Sapphire 4.049 and occasionally to 4.060
Corundum 3.90 and occasionally to 4.16
Cape Ruby 3.861
Demantoid 3.815
Staurolite 3.735
Malachite 3.710 and occasionally to 3.996
Group C.
Stones whose specific gravity lies between 3.50 and under 3.70.
Pyrope (average) 3.682
Chrysoberyl 3.689 and occasionally to 3.752
Spinel 3.614 and occasionally to 3.654
Kyanite 3.609 and occasionally to 3.688
Hessonite 3.603 and occasionally to 3.651
Diamond 3.502 and occasionally to 3.564
Topaz 3.500 and occasionally to 3.520
Group D.
Stones whose specific gravity lies between 3 and under 3.50.
Rhodonite 3.413 and occasionally to 3.617
Garnets 3.400 and occasionally to 4.500
Epidote 3.360 and occasionally to 3.480
Sphene 3.348 and occasionally to 3.420
Idocrase 3.346 and occasionally to 3.410
Olivine 3.334 and occasionally to 3.368
Chrysolite 3.316 and occasionally to 3.528
Jade 3.300 and occasionally to 3.381
Jadeite 3.299
Axinite 3.295
Dioptase 3.289
Diopside 2.279
Tourmaline (yellow) 3.210
Andalusite 3.204
Apatite 3.190
Tourmaline (Blue and Violet) 3.160
Tourmaline (Green) 3.148
" (Red) 3.100
Spodumene 3.130 and occasionally to 3.200
Euclase 3.090
Fluorspar 3.031 and occasionally to 3.200
Tourmaline (Colourless) 3.029
Tourmaline (Blush Rose) 3.024
Tourmaline (Black) 3.024 and occasionally to 3.300
Nephrite 3.019
Group E
Stones whose specific gravity lies between 2.50 and under 3.000.
Phenakite 2.965
Turquoise 2.800
Beryl 2.709 and occasionally to 2.81
Aquamarine 2.701 and occasionally to 2.80
Labradorite 2.700
Emerald 2.690
Quartz 2.670
Chrysoprase 2.670
Jasper 2.668
Amethyst 2.661
Hornstone 2.658
Citrine 2.658
Cordierite 2.641
Agate 2.610
Chalcedony 2.598 and occasionally to 2.610
Adularia 2.567
Rock-crystal 2.521 and occasionally to 2.795
Group F.
Stones whose specific gravity lies between 2.00 and under 2.50.
Haüynite 2.470 and occasionally to 2.491
Lapis lazuli 2.461
Moldavite 2.354
Opal 2.160 and according to variety to 2.283
"
(Fire Opal) 2.210 (average)
Group G.
Stones whose specific gravity is under 2.00.
Jet 1.348
Amber 1.000
Also see :
