"Beautiful Large white lab-created opal pendant necklace. These gorgeous opals are very similar to natural mined opals. Lab-created opals contain 70-90% silica (from which natural opal is formed) and 10-30% resin. The resin makes the opal harder, stronger, unlike natural opals, which are known to be soft and fragile. Each opal displays a rainbow of color that sparkles with every catch of light. I've handset two different size opals in a solid sterling silver prong settings 16x12mm (5/8\" x 1/2\" White Opal Birthstone Jewelry, Ethiopian Opal Oval Pendant Jewelry Gift, Elegant White Pink Opal Jewelry, Opal Necklace With Natural Stones As Gift, Oval Opal Pendant Jewelry As Gift, Pink Opal Gemstone Jewelry Gift, Opal Oval Pendant Jewelry For Gift, Opal Necklace With Natural Stones For Gift, Pink Opal Gemstone Jewelry For Gift