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Gemstone Encyclopedia
Chrysoberyl Cat's Eye: The Science of Chatoyanc...
Discover the science of Chrysoberyl Cat's Eye gemstone: orthorhombic crystal structure, chatoyancy from rutile inclusions, Mohs hardness 8.5, geological formation in Sri Lanka and Brazil, and identification tips vs simulants.
Chrysoberyl Cat's Eye: The Science of Chatoyanc...
Discover the science of Chrysoberyl Cat's Eye gemstone: orthorhombic crystal structure, chatoyancy from rutile inclusions, Mohs hardness 8.5, geological formation in Sri Lanka and Brazil, and identification tips vs simulants.
The Science of Star Stones: Exploring Asterism ...
Learn the optical physics of asterism in corundum: how rutile needles produce six-ray stars, crystallographic orientation for cabochon cutting, natural vs. synthetic identification, and top sources like Sri Lanka and...
The Science of Star Stones: Exploring Asterism ...
Learn the optical physics of asterism in corundum: how rutile needles produce six-ray stars, crystallographic orientation for cabochon cutting, natural vs. synthetic identification, and top sources like Sri Lanka and...
Pearl vs Shell: Same Material, Different Form
Pearl and shell are made of the same material - nacre. A complete comparison of pearl vs. shell nacre covering chemical composition, architectural differences, optical effects, and why structure determines...
Pearl vs Shell: Same Material, Different Form
Pearl and shell are made of the same material - nacre. A complete comparison of pearl vs. shell nacre covering chemical composition, architectural differences, optical effects, and why structure determines...
Pearl Nacre Thickness: Quality Science Guide
Pearl nacre thickness is the most important quality factor for durability and luster. A complete science guide to nacre thickness standards, what determines thickness, how to assess it, and its...
Pearl Nacre Thickness: Quality Science Guide
Pearl nacre thickness is the most important quality factor for durability and luster. A complete science guide to nacre thickness standards, what determines thickness, how to assess it, and its...
Pearl Overtone: Surface Iridescence Guide
What is pearl overtone? A complete guide to pearl surface iridescence - what causes overtone, overtone by pearl type, how to see it, its effect on value, and how to...
Pearl Overtone: Surface Iridescence Guide
What is pearl overtone? A complete guide to pearl surface iridescence - what causes overtone, overtone by pearl type, how to see it, its effect on value, and how to...
Pearl Color Cause: Nacre and Pigment Science
What causes pearl color? A complete science guide to pearl body color, overtones, and orient - covering conchiolin pigments, nacre interference, mantle tissue color, and natural vs. treated pearl color.
Pearl Color Cause: Nacre and Pigment Science
What causes pearl color? A complete science guide to pearl body color, overtones, and orient - covering conchiolin pigments, nacre interference, mantle tissue color, and natural vs. treated pearl color.