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Summary of each stone can be seen here: https://buygemstone.info/2019/02/14/how-to-determine-a-value-of-blue-sapphire-based-on-4cs-plus-ot-a-buying-guide-video/
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: https://buygemstone.info/2013/11/07/blue-sapphire-buying-treatment-guide-how-to-buy-and-tell-the-difference-between-natural-unheated-heated-lattice-diffusion-treatment-and-brand-new-glass-filled-sa/
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