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Schweizerische Gemmologische Gesellschaft
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Inclusions of hematite in feldspar (sunstone), India
Midge included in amber from the Baltic coast, polarised light
Fire opal, Mexico
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Two-phase inclusions in sapphire, Sri Lanka
Dumortierite in rock crystal, Brazil, polarised light

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