Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Two-phase inclusions in sapphire, Sri Lanka
Fluid inclusions in quartz with bituminous daughter minerals, China
Colour zoning in ruby from Mong-Shu, Burma
Spinel crystal in dolomite marble, Burma
Stress fissure («sun spangle») in baltic amber
Bubbles and swirls in moldavite (natural glass)
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
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