Fire opal, Mexico
Dumortierite in rock crystal, Brazil, polarised light
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Inclusions of hematite in feldspar (sunstone), India
Spinel crystal in dolomite marble, Burma
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Structure in a healing fissure in topaz from Brazil
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
E. nfgmmlgch