Agate from Reichweiler, Germany
Fire opal, Mexico
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Inclusions of hematite in feldspar (sunstone), India
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers

Contact

Swiss Gemmological Society
Secretary: Iva Pavic

c/o Iva Pavic, Heerenschürlistrasse 4, 8051 Zürich

T. +41 78 720 98 54
E. nfgmmlgch