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Pressure Heated Sapphire • Squeezing Sapphire • Corundums treated with high temperatures and low pressure (HT+P)
AGTL - Advanced Gem Testing Lab - Quench crackled flame fusion synthetic sapphire. This synthetic sapphire was heated and cooled to created the cracks and then reheated to heal them in an
I threw my blue sapphire because I wanted to make sure it's real and I found a scratch on it. Does it mean it's fake? - Quora
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