Subject 02 · 2 articles
Gemology
How gemstones are identified and altered: hardness, refractive index, spectroscopy, testing instruments, and the treatments used on the stones you buy.
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Hardness
Gemstone Hardness and the Mohs Scale Explained
What hardness in a gemstone actually means, how the Mohs scale came about, why its steps are so uneven, and whether anything is genuinely harder than diamond.
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Hardness
Gemstone Hardness List
Mohs hardness values for more than 140 gemstones and gem materials, from talc at 1 to diamond at 10, with the mineral species behind each trade name.
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