|
Table of Specific Gravities Of The Principal Gem Materials
Beryl (Emerald)................................ 2.74 Chrysoberyl (Alexandrite)...................... 3.73 Corundum (Ruby, sapphire, "Oriental topaz").... 4.03 Diamond........................................ 3.52 Garnet (Pyrope)................................ 3.78 " (Hessonite).................................. 3.61 " (Demantoid, known in the trade as "Olivine"). 3.84 " (Almandite).................................. 4.05 Opal........................................... 2.15 Peridot........................................ 3.40 Quartz (Amethyst, common topaz)................ 2.66 Spinel (Rubicelle, Balas ruby)................. 3.60 Spodumene (Kunzite)............................ 3.18 Topaz (precious)............................... 3.53 Tourmaline..................................... 3.10 Turquoise...................................... 2.82 Zircon, lighter variety........................ 4.20 " heavier variety.............................. 4.69
For a more complete and scientific discussion of specific gravity determination see Gem-Stones, by G. F. Herbert-Smith, Chapter VIII., pp. 63-77; or see, A Handbook of Precious Stones, by M.D. Rothschild, pp. 21-27, for an excellent account with illustrations; or see any physics text-book. |
You are here:
JJKent Home >>
Precious Stones Guide Vol 7
>> Table of Specific Gravities of Gems
| <<Specific Gravity in Precious Stones | Specific Gravity Determinations of Gems>> |