NATURAL BLUE CEYLON SAPPHIRE 925 SILVER RING Lovely blue Ceylon Sapphire 6.1x4.9x2 mm. Total weight 2.986 g. .Size 8 (P 1/2) Clarity SI Mined in Sri lanka cut in Thailand heat treated as all are. Sapphires are commonly worn as jewelry. Sapphires can be found naturally, by searching through certain sediments or rock formations. Sapphires are commonly worn as jewelry. In geological terms gem quality sapphire is rarer than diamond. Sapphire is the term for Aluminum Oxide (corundum). This durable material is the second hardest natural substance and is found in a broad range of colors. Ruby is red or pink corundum, all other colors are called sapphire. Blue is the traditional color but sapphire can also be clear, green, yellow, gold, purple, peach, color change or a mix of colors (sometimes called party, rainbow or bi-colored). Australia and Madagascar and Sri lanka being the most probable sources of the better quality material (We use DHL registered Singapore post and Australia post all items are posted in Australia.) Disclaimer. We use natural sunlight when we can. We also use lights that produce as close to possible natural daylight. We use photo shop to cut and edit but not to enhance. We also know many computer screens buyers use, vary greatly along with their eye sight. You get the products we sell at a very good price because we buy in bulk. Gems and opals especially need light sometime strong to see their wide ranges of colors and color play So make sure you have a good source of light when examining them. Cheers and thanks for your support.