📜 Key facts
| Age | Man-made since the 1970s (Gilson opal was first sold in 1974) |
|---|---|
| Origin & sources | Laboratory-grown, e.g. Gilson (France) and Kyocera (Japan). |
| Composition | Lab-grown silica spheres (some contain resin), arranged like natural precious opal |
How it forms
Silica spheres are settled and bonded in a lab to copy natural play-of-colour. Many show a 'lizard-skin' or chicken-wire pattern under magnification, which helps tell them from natural opal.
Mineral data: see Opal.
✨ Opal family

Black OpalMineral variety

Blue OpalMineral variety

Boulder OpalMineral variety

Chocolate OpalMineral variety

Common OpalMineral variety
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Crystal OpalMineral variety
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Dendritic OpalMineral variety
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Ethiopian OpalMineral variety

Fire opalMineral variety
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Green OpalMineral variety

Honey OpalMineral variety

HyaliteMineraloid variety

Matrix OpalMineral variety

OpalIMA mineral species

Opal Doublet & TripletMineral variety

OpaliteNatural glass

Opalized FossilFossil

Pink OpalMineral variety
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Precious opalGem material
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Virgin Valley OpalMineral variety

White OpalMineral variety

Wood OpalMineral variety
Learn more
Mineral variety
BlueMulticolor & Iridescent
Crown
Healing crystal



