Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusions of hematite in aquamarine, Tanzania
Agate from Anzi, Maroc
Spinel crystal in dolomite marble, Burma
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers

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