Cut from gem rough found the San Diego County, San Diego Torumaline™ has a soft pink color that looks great in a variety of jewelry designs. Tourmaline is one of the birthstones for October. Gems known as tourmaline generally come from elbaite, one member of the larger tourmaline family of minerals. Gem tourmaline is hard and usually transparent, with a range of colors coming from trace minerals specific to the source location of each particular gemstone. Rio is proud to offer the American Mined™ Collection, a growing selection of gemstones sourced from mines located here in America. These gemstones consistently present the excellent color, clarity and quality we look for in every gem we offer you. Each of these gemstones allows us to provide a clear, documentable path from the mine to your bench; you and your customers can be confident that every one is mined, cut and processed under conditions that meet all standards for worker safety, environmental protection and responsible production.