Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Colour zoning in ruby from Mong-Shu, Burma
Inclusions of hematite in aquamarine, Tanzania
Agate from Reichweiler, Germany
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Partially etched diamond crystal
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Bubbles and swirls in moldavite (natural glass)

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