How to Determine a Value of Blue sapphire? Based on 4Cs plus OT – A Buying Guide

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Summary of each stone can be seen here:

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.

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