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Schweizerische Gemmologische Gesellschaft
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Inclusion of apatite in ruby from Tanzania
Bubbles and swirls in moldavite (natural glass)
Dendrites in agate
Inclusions of hematite in aquamarine, Tanzania
Two-Phase inclusions and rutile needles in rock crystal from Brazil
Dumortierite in rock crystal, Brazil, polarised light
Inclusions of hematite in feldspar (sunstone), India
Structure in a healing fissure in topaz from Brazil

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