Bubbles and swirls in moldavite (natural glass)
Two-phase inclusions in sapphire, Sri Lanka
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Stress fissure («sun spangle») in baltic amber
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil

Contact

Swiss Gemmological Society
Secretary:  Rébecca Michelot
c/o BDO AG, Hodlerstrasse 5, 3001 Bern

T. +41 79 668 6989
E. info@gemmologie.ch