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Schweizerische Gemmologische Gesellschaft
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Stress fissure («sun spangle») in baltic amber
Spinel crystal in dolomite marble, Burma
Bubbles and swirls in moldavite (natural glass)
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Two-phase inclusion in amethyst, Brazil
Inclusion of apatite in ruby from Tanzania
Fluid inclusions in quartz with bituminous daughter minerals, China

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  • Gemmology
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