Two-Phase inclusions and rutile needles in rock crystal from Brazil
Inclusions of gilalite aggregates in rock crystal from Brazil
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Stress fissure («sun spangle») in baltic amber
Inclusions of hematite in feldspar (sunstone), India
Spinel crystal in dolomite marble, Burma
Inclusions of fossil plant debris in opal from Wollo, Ethiopia


Società Gemmologica Svizzera
Segretariato : Iva Pavic

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