Gemstone Hardness

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Gemstones hardness material is measured against the scale by finding the hardest material that that the given material can scratch, or the softest material that can scratch the given material. Below is a brief chart and description of Hardness scale of various gemstones that are quite popular among our clients.

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GEM MINERALS HARDNESS
Talc 1
Gypsum 2
Calcite, Coral, Pearl 3
Iron 4
Apatite, Turquoise. Haematite 5
Glass, Opal, Flourite, Lapiz Lazuli 5
Feldspar, Peridot, Jade, Kunzite, Nephrite 6
Tanzanite, Moonstone 6
Quartz, Garnet, Beryl, Emrald, Aquamarine 7
Amethyst, Citrine, Tourmaline 7
Topaz, Alexandrite, Cats Eye, Chrysobreyl 8
Zircon, Spinel 8
Corodum, Sapphire, Ruby 9
Diamond 10
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