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Gemstone Encyclopedia
Iolite: The Viking Compass Gemstone and Its Rem...
Discover the science behind iolite gemstone: its orthorhombic crystal structure causing intense pleochroism, Mohs hardness 7‑7.5, refractive index 1.54‑1.55, geological formation in metamorphic rocks, major deposits in India and Madagascar,...
Iolite: The Viking Compass Gemstone and Its Rem...
Discover the science behind iolite gemstone: its orthorhombic crystal structure causing intense pleochroism, Mohs hardness 7‑7.5, refractive index 1.54‑1.55, geological formation in metamorphic rocks, major deposits in India and Madagascar,...
Bloodstone: The Ultimate Guide to Identificatio...
Master bloodstone identification with expert tips on visual characteristics, simulant detection, and testing methods. Learn to spot dyed quartz, glass, resin, and painted fakes. Includes magnification, specific gravity, and fluorescence...
Bloodstone: The Ultimate Guide to Identificatio...
Master bloodstone identification with expert tips on visual characteristics, simulant detection, and testing methods. Learn to spot dyed quartz, glass, resin, and painted fakes. Includes magnification, specific gravity, and fluorescence...
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...