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• LAB ALERT...!!! "An update on Titanium-diffused Sapphire" (PDF File Size: 2.19 MB)  • GIT Seminar at Hong Kong - Colored Stone Market in Thailand: Choice of Quality (File size: 38.5 MB) - Ruby & Sapphire: Choice of Quality and Buying Tips (File size: 4.45 MB) • Heating Experiment of Copper- Bearing Tourmaline and Some Interesting Features • Winza Ruby : Declining or Waiting for New Season of Production |
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