Twin-crystal of chrysoberyl
Natural etching structure on a crystal face of diamond (trigons), polarised light
Partially etched diamond crystal
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Dendrites in agate
Two-phase inclusion in amethyst, Brazil
Agate from Reichweiler, Germany
Agate from Anzi, Maroc

Kontakt

Schweizerische Gemmologische Gesellschaft
Sekretariat: Willy Bieri

c/o Willy Bieri, Feldgass 34, 6170 Schüpfheim

T. +41 78 696 19 81
E. nfgmmlgch