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Advanced Quality is a family-owned colored gemstone company founded by Menahem Sevdermish and run by his son Kobi , that operates worldwi...
Advanced Quality is a family-owned colored gemstone company founded by Menahem Sevdermish and run by his son Kobi , that operates worldwide from mine right through to the wholesale market.
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    • Official GIA Channel - Channel

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      GIA Is the Largest, Most Respected Nonprofit Source of Gemological Knowledge in the World

      GIA exists to connect people to the understanding of gems. As a long-standing scientific authority, GIA is no
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