During the course of this systematic study, over 75,000 stones were processed. It was found that approximately 65%-70% of the pale blue, pale green and near-colorless sapphire could be converted to ...
Commissions do not affect our editors' opinions or evaluations. If the Olympics had a travel card category, the Chase Sapphire Reserve® would be standing on the podium. The card comes with an ...
A color-change sapphire was recently submitted to the GIA lab in Carlsbad for an origin determination ... Its weak ruby spectrum displayed absorption lines in the red area between 660 and 695 nm, a ...