RARE and exquisite Kanchanaburi sapphire ring in excess of 6 carats accented with diamonds in a 14K gold setting The sapphires are the textbook perfect velvety blue coveted by gem collectors. This double band ring is an estate piece which I purchased in 1975. It is in fine condition. The setting is jeweler tested to 14K yellow gold. The gem carat weight is estimated since the gemstones are in the setting. The Kanchanaburi Sapphire gem gravels were discovered in 1918 and are located in the Bo Phloi District of Thailand's Kanchanaburi province, best known for the famous Bridge over the River Kwai. The small town of Bo Phloi was founded near the mines. Mining of this alluvial Sapphire deposit occurred in several open pit-mines and was one of the world's main Sapphire sources for decades. These gems are old production mined at least 40 years ago. Fifty tons of soil were excavated to extract only 1 carat of gem crystals from the 4-5 meter thick gem-bearing gravels. As of 1994 most of the deposits had been exhausted and mining substantially reduced. Today, most of the former mines have been transformed int, golf courses and recreational areas. With no significant mining since 2009, the genuine rarity of Kanchanaburi Sapphire is undeniable. *FREE SHIPPING in USA with signature required for your protection * RETURN POLICY - I gladly accept returns and exchanges within 7 days of delivery for a full refund. Buyer to pay return shipment by a method with tracking and insured for full value. I am not responsible for loss or damage to items being returned to me. Returns cannot be accepted on items which have been altered or resized unless previously arranged with seller. *LAYAWAY on items over $300 *GIFT WRAP: Free gift wrap on most jewelry *Website https://www.elegantartifacts.com/ or https://elegantartifacts.com/ *Click here to return to my home page and see other items in my shop https://www.etsy.com/shop/elegantartifacts or https://elegantartifacts.com/