Besides the greater generic and generally employed gemstones such as from diamonds, rubies, sapphires, and emeralds, pearls and opal[24] have also been described as precious within the jewellery trade. Up to your discoveries of bulk amethyst in Brazil from the nineteenth century, amethyst was viewed as a "precious stone" likewise, https://certifiedgemstones96172.tokka-blog.com/27024088/5-easy-facts-about-diamond-gemstone-benefits-described