Spesific Gravity Table Of All Stone

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 

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