Colour zoning in ruby from Mong-Shu, Burma
Dendrites in agate
Inclusions of hematite in feldspar (sunstone), India
Stress fissure («sun spangle») in baltic amber
Inclusions of gilalite aggregates in rock crystal from Brazil
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
«Red fox agate» from Patagonia, Argentina


Swiss Gemmological Society
Secretary: Iva Pavic

c/o Iva Pavic, Heerenschürlistrasse 4, 8051 Zürich

T. +41 78 720 98 54
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