Gemstones with SG 2.20

5 gemstones have a specific gravity range that includes 2.20. Specific gravity measures density relative to water — a key diagnostic property for gem identification. Measured by hydrostatic weighing or heavy liquids.

← All SG Values

GemstoneSG RangeRI RangeCrystal SystemHardness
Chrysocolla2.00 – 2.401.460 – 1.630Amorphous2.5–7
Hackmanite2.14 – 2.401.483 – 1.487Cubic5.5–6
Sodalite2.14 – 2.401.483 – 1.487Cubic5.5–6
Opal1.98 – 2.251.370 – 1.470Amorphous5.5–6.5
Fire Opal1.98 – 2.201.370 – 1.470Amorphous5.5–6.5
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