Gemstones with SG 2.40

5 gemstones have a specific gravity range that includes 2.40. 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
Obsidian2.30 – 2.601.480 – 1.510Amorphous5–5.5
Variscite2.40 – 2.601.560 – 1.590Orthorhombic3.5–4.5
Hackmanite2.14 – 2.401.483 – 1.487Cubic5.5–6
Sodalite2.14 – 2.401.483 – 1.487Cubic5.5–6
Chrysocolla2.00 – 2.401.460 – 1.630Amorphous2.5–7
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