SAPPHIRE
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The needle-like inclusions in this sapphire prove that its color is natural and not the result of heating. Heating would have caused the inclusions to dissolve or break up. - Photo by Clayton Welch/GIA
The needle-like inclusions in this sapphire prove that its color is natural and not the result of heating. Heating would have caused the inclusions to dissolve or break up. - Photo by Clayton Welch/GIA
