

17th Place, 1983
John I. Koivula
Gemological Institute of America
Santa Monica, California, USA
Amber polished to view dendritic air bubbles trapped between sequential flowlayers (40x)
Brightfield


John I. Koivula
Gemological Institute of America
Santa Monica, California, USA
Amber polished to view dendritic air bubbles trapped between sequential flowlayers (40x)
Brightfield