Opal Freeform - Height: 22 mm - Width: 25 mm- 4 g - (1)

Boulder opal freeform mounted on a chain.
Weight 4 grams / 20 carats
The stone measures 22 x 25 x 4 mm.
Boulder opals are extremely rare. They formed through deposits of silica-rich water that became trapped inside iron-bearing minerals.
Australian boulder opals are a gemstone that gains value over time and will add prestige to your collection.