Natural Boulder Opal Carved flower Ring, 925 Silver, size 7.5

5.96 cts Natural Brown Boulder Opal, fancy carved flower Ring, 925 Silver, size 7.5. If you are looking for something unique that no one else will have on their finger, then this ring is for you. It is a beauty, reflecting the artisan's skill and creativity!. It has rich opal colors flashing greens, blues, purples and reds through a spiral in the center and triangles in the flower petals. It is a gorgeous and rare design. Hand crafted. Australian Boulder opals are the second most valuable type of opal (following black opal). Boulder opals are easily distinguished by their layer of solid brown ironstone left on the back of the stone. Boulder opals, as the name suggests, are mined from large ironstone boulders under the ground. Thin veins of colorful opal forms in cracks and fissures in these boulders. Because these veins of color are so thin, opal cutters need to leave the ironstone on the back of the opal to form a full sized stone. The thin layer of opal in boulder opals can display any color of the spectrum in a beautiful play of color. Although the ironstone layer providing the backing to boulder opals may appear similar to doublets upon first inspection, the formation is completely natural. (quoted from Opalsdownunder.com.au)