Australian Boulder Opal Cabochon Cut. 10.38 ct

Australian Boulder Opal Cabochon Cut. 10.38 ct. Natural Matrix Unheated Opal. Beautiful Pattern.

WEIGHT : 10.38 ct
SIZE : 18.80 * 14.71 *4.96
SHAPE : Cabochon 
CLARITY GRADE : Opaque
TREATMENT : Untreated
HARDNESS : 5.5 - 6.5 

The Opal is associated with good luck, it is the birthstone for October and the gem fo 14th wedding anniversaries.

The name for the opal comes from the Sanskrit word "Upala", meaning precious stone or stone par excellence. The Greek word "opallios" means "to see a change of colors".