Opal Cabochons - Height: 50 mm - Width: 35 mm- 30 g - (1)

Freeform mounted on a Boulder Koroit opal chain from Queensland.
Weight: 39 grams.
The stone measures 50 x 35 x 17 mm.

Boulder Koroit opals belong to the Boulder Opal family and are extremely rare. They formed through deposits of silica-rich water that became trapped inside iron-bearing minerals called Matrix.
Boulder Koroit opals are highly sought after for their intricate patterns where the colors of the earth and the crystals blend into wonderful structures that have inspired Aboriginal art since prehistoric times, and for this reason they are called "tribal patterns."
Australian Boulder opals are a gemstone that increases in value over time and will add prestige to your collection.