Opal
Opal
Opal is hydrated silica, and precious opal flashes with play-of-colour — patches of spectral colour that shift as the stone moves. In Vedic tradition it is an uparatna for diamond, linked with Venus (Shukra).
Hardness 5.5–6.5Australia
Hydrated silica gems — precious opal with its play-of-colour, and fire opal.