Ключевые слова: alumina oxide, artificial, characteristic, color, colored, colour, coloured, copy space, corundum, cut out, dark red, gem, gem stones, gems, gemstones, halved, isolated, jewelery, light, melting pear, mineral, minerals, negative space, oxide, precious stone, precious stones, raw, red, rough, rough stone, ruby, stained, stone, stones, synthetic, unfinished, unpolished, white,