As gemstone wholesalers we at www.gemrockauctions.com offer a wide range of Gemstones and loose gemstones, Including Ametrine which comes from only one mine in South America and is basically mined out, Ametrine is generally a Purple and Yellow transparent crystal. It is a highly sought-after precious Gem, which for centuries has been widely used in the creation and encrustation of jewellery and everyday items. - Its Chemical Composition number is SiO2 (minor iron impurities cause ametrine's colours.) - The owners of www.gemrockauctions.com have their own factory and source their rocks and gemstones directly from miners or as close as possible in order to receive the right price, our factory can offer high discounts on sales we have 16 staff who cut gemstones full time and produce high quality products - we don’t cut artificial gemstones.