3.87 ct boulder opal 23.1×6.2×3.6mm$1,100.00 USD USD AUD Out of stock SKU: TG2310 Category: Boulder Opal Opal Specifications Additional information Weight 3.87 ct Dimensions 23.1 × 6.2 × 3.6 mm Brightness B3 Bright Cut Freeform Dome Low Dome Opal Origin Queensland Predominant Colors Green, Gold Product Enquiry