Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Inclusions of hematite in aquamarine, Tanzania
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Twin-crystal of chrysoberyl
Partially etched diamond crystal
Natural etching structure on a crystal face of diamond (trigons), polarised light

Contatti

Società Gemmologica Svizzera
Segretariato : Willy Bieri

c/o Willy Bieri, Feldgass 34, 6170 Schüpfheim

T. +41 78 696 19 81
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