Ключевые слова: accessory, aluminium, blue, corundum, crystal, decoration, decorative, fashion, gem, gemological, gemstone, grip, grooves, hardness, heap, holding, isolated, jewel, jewelry, lapidary, light, lot, macro, material, metal, mineral, natural, oxide, pile, precious, raw, rock, rough, sapphire, shiny, stone, supplies, translucent, tweezers, uncut, unpolished, value,