Cobalt -infused lead glass filled Sapphires

Since 2012 sapphires have been treated with this new method

Many buyers are unaware of this treatment with sapphires

Our Gemstone Sheriff program will monitor our sellers listings of sapphire in regards to treatments

Sapphires that are treated with Cobalt fissure filled can now be identified under our search criteria as

Filled cavities or fissure/Cobalt

And sellers can list these treated cobalt sapphire with code

Treated CF

This search is same criteria for Ruby and Sapphires.



We always recommend buyers purchase valuable sapphire with certificate so they know exactly what they are buying.>




we offer links to to reputable specialist to view comments and testing done by AGL and other specialists Composite Sapphires-January 2013.pdf

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