The author recently examined a 0.16 ct transparent oval modified brilliant tourmaline containing an included euhedral crystal (see above). The inclusion, identified by Raman spectroscopy as tourmaline, displayed a rolled trigonal prism with blunt terminations and associated stress fractures. Tourmaline inclusions in tourmaline have been previously documented (N. Renfro et al., “Micro-features of tourmaline,” Summer 2024 G&G, pp. 208–210); however, it is rare to see such a perfectly shaped crystal inclusion.
Hikaru Sato is a gemologist trainee at GIA in Tokyo.
The author recently examined a 0.16 ct transparent oval modified brilliant tourmaline containing an included euhedral crystal (see above). The inclusion, identified by Raman spectroscopy as tourmaline, displayed a rolled trigonal prism with blunt terminations and associated stress fractures. Tourmaline inclusions in tourmaline have been previously documented (N. Renfro et al., “Micro-features of tourmaline,” Summer 2024 G&G, pp. 208–210); however, it is rare to see such a perfectly shaped crystal inclusion.
Hikaru Sato is a gemologist trainee at GIA in Tokyo.
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