Synthetic corundum Gemstone Material Rough corundum ruby rough
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Shandong Yantai Polaris Huajing Gem Co., Ltd.(The old name is Yantai Gem Factory )is one of the largest production bases of synthetic corundum in China ,using verneuil\'s method. we started to
develop the production of synthetic gemstones since 1966, enjoying a long history of gemstone production.
