Double-sided Semi-black Opal 10.7 ct 25.34 x 16.73 mm Beautiful semi-black opal cut into a domed pear and polished on both sides. One side is divided into two areas, one intense frank green and blue, and the other has multiple red, orange, yellow, and blue flashes. The reverse is iridescent with intense green and blue veined with black filaments. Add to basket