Boulder opal is found in an area that was the edge of a mighty inland sea and where once there was lush vegetation and dinosaurs roamed. Over time the sea evaporated and left behind the opal, filling voids over millions of years. When the opals are extracted from the earth they show little of what lies inside and only when you break them open do they reveal their true beauty.
Size in mm: 27mm x 19mm x 6mm (thick)
Carat Weight: 19.3ct