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Gemstone Encyclopedia
Lepidolite and the Lithium Micas: Why Gemologis...
Lepidolite is a lithium-rich mica series, not one fixed mineral. Compare it with zinnwaldite and see why color, cleavage, and luster alone cannot confirm a species name.
Lepidolite and the Lithium Micas: Why Gemologis...
Lepidolite is a lithium-rich mica series, not one fixed mineral. Compare it with zinnwaldite and see why color, cleavage, and luster alone cannot confirm a species name.
Coral in Gemology: Varieties, Composition, and ...
Coral is an organic gem of calcium carbonate, not a mineral. Learn how precious coral varieties are classified and why laboratory-grown coral usually means reconstituted, imitated, or aquacultured material rather...
Coral in Gemology: Varieties, Composition, and ...
Coral is an organic gem of calcium carbonate, not a mineral. Learn how precious coral varieties are classified and why laboratory-grown coral usually means reconstituted, imitated, or aquacultured material rather...
Moss Agate Color Zoning: Why Green Patterns Are...
Moss agate green patterns are inclusion-based color, not true growth zoning. Learn how chlorite and iron oxide inclusions affect appearance, density, and specific gravity.
Moss Agate Color Zoning: Why Green Patterns Are...
Moss agate green patterns are inclusion-based color, not true growth zoning. Learn how chlorite and iron oxide inclusions affect appearance, density, and specific gravity.
Unakite Is a Rock, Not a Crystal: Reading Its I...
Unakite is an altered granitic rock, not a mineral species. Learn how epidote, feldspar, and quartz combine to create its distinctive pink-and-green appearance and why it has no single crystal...
Unakite Is a Rock, Not a Crystal: Reading Its I...
Unakite is an altered granitic rock, not a mineral species. Learn how epidote, feldspar, and quartz combine to create its distinctive pink-and-green appearance and why it has no single crystal...
Why Celestite Specimens Look So Different: The ...
Celestite varies widely in color, habit, and clarity. Learn why the same strontium sulfate species forms such different specimens and what those differences reveal.
Why Celestite Specimens Look So Different: The ...
Celestite varies widely in color, habit, and clarity. Learn why the same strontium sulfate species forms such different specimens and what those differences reveal.
How Synthetic Aquamarine Is Grown and Why Clari...
Synthetic aquamarine and natural aquamarine are both beryl. Learn why transparency does not identify origin, how hydrothermal beryl grows, and which features actually help distinguish natural from laboratory-grown material.
How Synthetic Aquamarine Is Grown and Why Clari...
Synthetic aquamarine and natural aquamarine are both beryl. Learn why transparency does not identify origin, how hydrothermal beryl grows, and which features actually help distinguish natural from laboratory-grown material.