Two-phase inclusion in amethyst, Brazil
Inclusion of apatite in ruby from Tanzania
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Fire opal, Mexico
Partially etched diamond crystal
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Stress fissure («sun spangle») in baltic amber
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania


Schweizerische Gemmologische Gesellschaft
Sekretariat: Willy Bieri

c/o Willy Bieri, Feldgass 34, 6170 Schüpfheim

T. +41 78 696 19 81
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