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Expert insights on rough stones, gemology, origins, treatments, and the art of collecting fine gems from around the world.

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The Spectrum of Sapphire: Colors and Types
FEATURED · Gems

The Spectrum of Sapphire: Colors and Types

Sapphires are the "monarchs" of the colored gemstone world. While many think exclusively of blue, this variety of the mineral corundum comes in nearly...

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Jul 29, 2026 · 4 min read
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