Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Fire opal, Mexico
Structure in a healing fissure in topaz from Brazil
Two-phase inclusion in amethyst, Brazil
Dendrites in agate
Natural etching structure on a crystal face of diamond (trigons), polarised light
«Red fox agate» from Patagonia, Argentina
Inclusions of hematite in feldspar (sunstone), India

Contact

Swiss Gemmological Society
Secretary: Willy Bieri

c/o Willy Bieri, Feldgass 34, 6170 Schüpfheim

T. +41 78 696 19 81
E. nfgmmlgch