Characteristics of trapiche blue sapphires from southern Vietnam

Trapiche patterns are common in emeralds but less common in corundum, and are typically restricted to ruby. Trapiche sapphire is comparatively rare. Blue sapphires of the trapiche type from southern Vietnam reveal a distinct core and fixed six-rayed star, similar in appearance to the patterns found...

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Bibliographic Details
Main Authors: Kanyarat Khotchanin, Panjawan Thanasuthipitak, Theerapongs Thanasuthipitak
Format: Journal
Published: 2018
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Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=74849137867&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/50608
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Institution: Chiang Mai University