
Recently held at Sotheby's jewelry auction, the same types of colored gemstones continue to be sought after, commonly known as opal opal stone is one of them. A white Ze, purple change color opal rings starting at 12 million Hong Kong dollars, 35 million dollar deal; red series opal necklace, the price actually more than one million Hong Kong dollars. ...True Opal Halo flow the higher the hardness value can be higher (Figure)
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