Robuta

https://www.gemologyonline.com/Forum/phpBB2/viewforum.php?f=55&sid=07aa82b59c3072f78061e08c8875bb6e GGTL Laboratories - GemologyOnline.com ggtllaboratories https://ggtl-lab.org/en/news/cinnabar-inclusions-ethiopian-opal Cinnabar Inclusions in Ethiopian Opal | GGTL The authors recently examined a 15.8 ct Ethiopian opal (cover picture) that contained numerous red dendritic particles (Figure 1) that each measured about up... ethiopian opalcinnabarinclusionsggtl https://www.gemologyonline.com/Forum/phpBB2/viewforum.php?f=55&sid=c4a6b361bdc0a78e6f921b9b18e4ec97 GGTL Laboratories - GemologyOnline.com ggtllaboratories