Blue color zoning observed in some of the unusual rubies; immersed in
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Blue color zoning observed in some of the unusual rubies; immersed in
Strong blue color zones were observed in many of the Jegdalek rubies.
Color distribution
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PDF) Challenging Synthetic Rubies Examined in GIA's Bangkok and Hong Kong Laboratories
Blue color zoning observed in some of the unusual rubies; immersed in