Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Two-phase inclusions in sapphire, Sri Lanka
Colour zoning in ruby from Mong-Shu, Burma
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Agate from Anzi, Maroc
Natural etching structure on a crystal face of diamond (trigons), polarised light
Partially etched diamond crystal
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

Contatti

Società Gemmologica Svizzera
Segretariato : Willy Bieri

c/o Willy Bieri, Feldgass 34, 6170 Schüpfheim

T. +41 78 696 19 81
E. nfgmmlgch