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Gemstone Encyclopedia
Hardness, Toughness, Cleavage, and Fracture in ...
Why a Mohs hardness of 9 does not make ruby unbreakable. Learn the real differences between hardness, toughness, cleavage, parting, and fracture in red corundum, and how structure controls durability.
Hardness, Toughness, Cleavage, and Fracture in ...
Why a Mohs hardness of 9 does not make ruby unbreakable. Learn the real differences between hardness, toughness, cleavage, parting, and fracture in red corundum, and how structure controls durability.
Bloodstone Sources and Identity: Separating Geo...
Learn the true geological distribution of bloodstone, why India isn't its only source, and how to distinguish factual gemology from common online misconceptions.
Bloodstone Sources and Identity: Separating Geo...
Learn the true geological distribution of bloodstone, why India isn't its only source, and how to distinguish factual gemology from common online misconceptions.
Natural Versus Cultured Conch Pearls: What the ...
Understand the conch pearl trade name, natural versus cultured origin, production methods, and gemological identification limits.
Natural Versus Cultured Conch Pearls: What the ...
Understand the conch pearl trade name, natural versus cultured origin, production methods, and gemological identification limits.
Kashmir Sapphire: Separating the Geographic Lab...
Learn how Kashmir sapphire is defined, why specific gravity cannot prove origin, and what reconstructed or composite sapphires really are.
Kashmir Sapphire: Separating the Geographic Lab...
Learn how Kashmir sapphire is defined, why specific gravity cannot prove origin, and what reconstructed or composite sapphires really are.
Lapis Lazuli: Rock, Mineral, or Trade Name?
Learn why lapis lazuli is a rock, not a single mineral, how its identity differs from lazurite, and why trade names add to the confusion.
Lapis Lazuli: Rock, Mineral, or Trade Name?
Learn why lapis lazuli is a rock, not a single mineral, how its identity differs from lazurite, and why trade names add to the confusion.
Why Apatite Transparencies Differ: Clarity Habi...
Explore the gemological reasons behind apatite transparency differences. Primary deposits produce variable clarity, while secondary deposits selectively preserve clearer apatite.
Why Apatite Transparencies Differ: Clarity Habi...
Explore the gemological reasons behind apatite transparency differences. Primary deposits produce variable clarity, while secondary deposits selectively preserve clearer apatite.