Opal (Var: Precious Opal), Opal

Specimen ID: TCM-XU8

Opal (Var: Precious Opal) : SiO2·nH2O
Opal : SiO2·nH2O
As recorded:
Carbonera Mine, La Trinidad, Tequisquiapan Municipality, Queretaro, Mexico
51mm x 30mm x 15mm
Unusual locality for this sort of opal that looks very Australian. The Carbonara mine in Mexico has produced mostly a reddish "Fire Opal" but small amounts of precious Opal with a milky white base have been found over the years. This piece has quite good fire with red, green, blue and some orange color flashes.
Previous data
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4,951,360 minIDs have been issued as of 19th Oct 2019 8:55 am BST