Ключевые слова: african, amethyst, ancient, blue, colour, crystal, dark, diamond, esoteric, expensive, gems, gemstones, geology, glass, history, india, indian, jem, jem stone, jeweler, jewellery, jewelry, liquid, minerals, mining, nature, raw diamond, reflection, rich, rock, sample, sapphire, semi, shiny, sparkling, texture, transparent, treasure, uncut diamond, vintage,