Precious and semi-precious stones, of which topaz is one, have been used since antiquity for their many properties.
Stone of nobles, of glory and confidence, topaz changes its virtues with its color: here are all its secrets.
Color
Colorless, yellow to orange-brown, sometimes blue or pink, more rarely green
Crystal system
Orthorhombic
Composition
Aluminum fluorosilicate
Hardness
8 on the Mohs scale
Price
$6 to $15 for a blue topaz, $30 to $1,500 for an imperial topaz
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What are the origins of topaz?
Pliny the Elder tells that topaz came from a foggy island in the Red Sea, Topazios, so hard to find that its name was said to come from a word meaning “to seek.” The island was infested with snakes, guardians of the stone, and topaz gave it a magical glow that defied the night.
That island, today Zabargad, actually yielded another stone, peridot: for centuries, almost any yellow stone was called “topaz.” True topaz is an aluminum fluorosilicate, one of the hardest gems, found notably in Brazil, the Urals, Pakistan and Sri Lanka.
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