Colorful Boulder Opal 6.13 ct

Colorful Boulder Opal 6.13 ct. This beautiful Australian gemstone shows a spectacular pattern; , green, blue and yellow are the dominant colors. Cabochon Cut. This unheated small stone is amazing.

WEIGHT : 6.13 ct
SIZE : 13.20 * 11.15 * 4.93  mm
SHAPE : Cab. Free form
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".

The opal is an amorphous substance that belongs to the silica group. It is formed by a series of spherical microscopic structures of various sizes, which diffract light to show a beautiful play of colors.