Dumortierite in rock crystal, Brazil, polarised light
Two-Phase inclusions and rutile needles in rock crystal from Brazil
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Bubbles and swirls in moldavite (natural glass)
Agate from Reichweiler, Germany
Partially etched diamond crystal
Colour zoning in ruby from Mong-Shu, Burma
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Fluid inclusions in quartz with bituminous daughter minerals, China
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
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