Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Fire opal, Mexico
Stress fissure («sun spangle») in baltic amber
Twin-crystal of chrysoberyl
Dumortierite in rock crystal, Brazil, polarised light
Structure in a healing fissure in topaz from Brazil
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Colour zoning in ruby from Mong-Shu, Burma


Swiss Gemmological Society
Secretary: Willy Bieri

c/o Willy Bieri, Feldgass 34, 6170 Schüpfheim

T. +41 78 696 19 81
E. nfgmmlgch