Are the rarest of all. They are considered to be among the finest sapphires in the world. Found only in Montana, primarily in Yogo Gulch in Judith Basin County, Montana, the Treasure State of the USA, Yogo sapphires are typically cornflower blue, a result of trace amounts of iron and titanium.They have high uniform clarity and maintain their brilliance under artificial light. It is an all-natural sapphire that requires no heat treatments. Ninety-five percent of the world's sapphires must be treated with heat to achieve the brilliant colors for which sapphires are known. Last one of a Limited Edition Exquisite trilogy designer ring, featuring three matched 5 x4mm fancy oval cut and prong set, 100% completely natural and untreated, highly collectable and extremely rare, with exceptional sparkling clear clarity and certified genuine Yogo Montana Sapphire s, amounting to 1.30 carats in gemweight, and of the most attractive Peacock blue colour saturation displaying green undertones, beautifully embellished at either end by four genuine and ethically sourced, sparkling white baguette Diamonds, tension set into a substantial hallmarked 375, solid 9K carat yellow gold band, comfortable to wear, with a total weight of 2 grams. I will also combine P&P so please take a look at my other listed items. The item "V Rare Yogo Montana Peacock Sapphire Trilogy & Diamond 9K Y Gold Ring Size N/6.5" is in sale since Sunday, December 5, 2021. This item is in the category "Jewellery & Watches\Fine Jewellery\Rings". The seller is "felixnyko" and is located in Cambridge, Cambridgeshire. This item can be shipped worldwide.