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Gemstone Encyclopedia
Red Jasper vs. Carnelian: Why Heat Treatment Bl...
How to tell red jasper from carnelian, why heat treatment can cause confusion, and the gemological properties that help separate these silica gemstones.
Red Jasper vs. Carnelian: Why Heat Treatment Bl...
How to tell red jasper from carnelian, why heat treatment can cause confusion, and the gemological properties that help separate these silica gemstones.
Distinguishing Natural Prasiolite from Laborato...
Discover how to tell natural prasiolite from laboratory-grown green quartz. Explore crystal habit, growth patterns, seed plates, and inclusions in this gemological guide to prasiolite identification.
Distinguishing Natural Prasiolite from Laborato...
Discover how to tell natural prasiolite from laboratory-grown green quartz. Explore crystal habit, growth patterns, seed plates, and inclusions in this gemological guide to prasiolite identification.
Why Does Iolite's Color Change with Viewing Angle?
Discover why iolite shifts from blue to gray-yellow when viewed from different angles. This is strong pleochroism in cordierite, not a color change. Learn how cutters orient the stone to...
Why Does Iolite's Color Change with Viewing Angle?
Discover why iolite shifts from blue to gray-yellow when viewed from different angles. This is strong pleochroism in cordierite, not a color change. Learn how cutters orient the stone to...
Why Morganite Ranges from Water-Clear to Milky:...
Discover why morganite varies in transparency, from eye-clean to cloudy. Learn about fluid inclusions, healed fractures, growth zoning, pegmatite geology, and how heat treatment impacts morganite clarity.
Why Morganite Ranges from Water-Clear to Milky:...
Discover why morganite varies in transparency, from eye-clean to cloudy. Learn about fluid inclusions, healed fractures, growth zoning, pegmatite geology, and how heat treatment impacts morganite clarity.
Apatite vs. Fluorapatite: How Crystal Structure...
Explore how apatite's hexagonal crystal structure defines its mineral species, optical properties, and diagnostic features, and how it separates this gem from commonly confused stones like tourmaline and beryl.
Apatite vs. Fluorapatite: How Crystal Structure...
Explore how apatite's hexagonal crystal structure defines its mineral species, optical properties, and diagnostic features, and how it separates this gem from commonly confused stones like tourmaline and beryl.
Why Most Cat's Eye Chrysoberyl Is Not Phenomena...
Explore the difference between cat's eye chrysoberyl and ordinary chrysoberyl, why chatoyancy is rare, and how inclusions and cutting orientation determine the phenomenon.
Why Most Cat's Eye Chrysoberyl Is Not Phenomena...
Explore the difference between cat's eye chrysoberyl and ordinary chrysoberyl, why chatoyancy is rare, and how inclusions and cutting orientation determine the phenomenon.