💎🔍 Can You Tell Whether This Sapphire Is Natural, Synthetic, or Treated? 🔍💎 Today our students took on another exciting gem challenge - identifying five similar-looking sapphires using ONLY the microscope! 🔬💙 They examined and compared: ✨ Natural untreated sapphire ✨ Synthetic hydrothermal sapphire ✨ Natural heat-treated sapphire ✨ Synthetic flame-fusion sapphire ✨ Natural sapphire treated by diffusion Using just microscopic clues, they learned how subtle details can reveal a gemstone’s tr
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FacebookAIGS - Asian Institute of Gemological Sciences
💎🔍 Can You Tell Whether This Sapphire Is Natural, Synthetic, or Treated? 🔍💎 Today our students took on another exciting gem challenge - identifying five similar-looking sapphires using
AIGS - Asian Institute of Gemological Sciences. . 💎🔍 Can You Tell Whether This Sapphire Is Natural, Synthetic, or Treated? 🔍💎 Today our students took on another exciting gem challenge - identifying five similar-looking sapphires using ONLY the microscope! 🔬💙 They examined and compared: Natural untreated sapphire Synthetic ...
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How can GIA scientists know if a natural sapphire has received heat treatment? One clue is through its inclusions. Sapphires that formed in metamorphic rock often contain carbon dioxide fluid inclusions or negative crystals. If heat-treated, the carbon dioxide escapes from these inclusions so that they become empty. When the stone and its inclusions are cooled to below 31.5°C, a visible carbon dioxide vapor bubble forms within the liquid. This vapor bubble and the presence of liquid indicate tha
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