Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Stress fissure («sun spangle») in baltic amber
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Midge included in amber from the Baltic coast, polarised light
Partially etched diamond crystal
Two-phase inclusions in sapphire, Sri Lanka
Fluid inclusions in quartz with bituminous daughter minerals, China
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

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Schweizerische Gemmologische Gesellschaft
Sekretariat: Rébecca Michelot
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