Besides the greater generic and typically utilised gemstones for instance from diamonds, rubies, sapphires, and emeralds, pearls and opal[24] have also been described as precious during the jewellery trade. Up towards the discoveries of bulk amethyst in Brazil from the 19th century, amethyst was regarded as a "precious stone" also, https://stearnsi170efg5.theblogfairy.com/profile