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Schweizerische Gemmologische Gesellschaft
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Fire opal, Mexico
Inclusions of hematite in aquamarine, Tanzania
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Bubbles and swirls in moldavite (natural glass)
Inclusions of gilalite aggregates in rock crystal from Brazil
Stress fissure («sun spangle») in baltic amber
Midge included in amber from the Baltic coast, polarised light
Agate from Anzi, Maroc

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  • Gemmology
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