This is the rarest variety of beryl. It was discovered in 1904 in the Wah Wah Mountains of Utah, USA, and this is still the only deposit known. The old synonym of bixbite is used less and less because of the risk of confusion with the mineral bixbyite, which occurs in the same area. The crystals appear in the cracks of volcanic rock and have, as far as is known, never been longer than 30 mm. Prices for top quality natural red beryl can be as high as $10,000 per carat for faceted stones. In USA it is also known as "red emerald", as, being a beryl, it is from the same family as the emerald.