Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Two-phase inclusions in tourmaline from Namibia
Dumortierite in rock crystal, Brazil, polarised light
Fire opal, Mexico
Inclusion of apatite in ruby from Tanzania
Agate from Reichweiler, Germany
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Kontakt

Schweizerische Gemmologische Gesellschaft
Sekretariat: Rébecca Michelot
c/o BDO AG, Hodlerstrasse 5, 3001 Bern

T. +41 79 668 6989
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