Partially etched diamond crystal
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Spinel crystal in dolomite marble, Burma
Agate from Reichweiler, Germany
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Two-phase inclusion in amethyst, Brazil
Stress fissure («sun spangle») in baltic amber
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers


Societé Suisse de Gemmologie
Sekretariat: Willy Bieri

c/o Willy Bieri, Feldgass 34, 6170 Schüpfheim

T. +41 78 696 19 81
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