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Summary of each stone can be seen here: [ Ссылка ]
In this video, I tried to discuss the thought process in determining the value for a blue sapphire based on 6 criteria's which I call 4Cs + OT. The criteria are Carat Weight, Color, Clarity, Cut, Origin and Treatments.
For additional pictures and explanation regarding blue sapphire treatments I would recommend to check our very popular blog post: [ Ссылка ]
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