Ruby Quality Factors - GIA.eduThe GIA Laboratory uses a controlled set of comparison stones called masterstones to determine if corundum is ruby or if it's pink, purple, or orange sapphire.glass corundum ruby crusher compactors,How Do They Treat Ruby Gemstones? | Gem Rock AuctionsJan 5, 2011 . How do they treat Ruby gemstones and what does it do to the stone? Some of the treatments have names like "Heat Treatment", "Glass Filling",.Separating Glass-Filled Rubies Using the DiamondView | Gems .The treatment of gemstones using various filler materials is not new. In the case of corundum, silica glass was often observed filling rubies from approximately.
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