Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Colour zoning in ruby from Mong-Shu, Burma
Stress fissure («sun spangle») in baltic amber
Bubbles and swirls in moldavite (natural glass)
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Fluid inclusions in quartz with bituminous daughter minerals, China
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Twin-crystal of chrysoberyl
«Red fox agate» from Patagonia, Argentina
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