Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Fluid inclusions in quartz with bituminous daughter minerals, China
Dumortierite in rock crystal, Brazil, polarised light
Two-phase inclusions in tourmaline from Namibia
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Agate from Reichweiler, Germany
Twin-crystal of chrysoberyl
Natural etching structure on a crystal face of diamond (trigons), polarised light

Contact

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

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