Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil

Twin-crystal of chrysoberyl

Bubbles and swirls in moldavite (natural glass)

Partially etched diamond crystal

Spinel crystal in dolomite marble, Burma

Stress fissure («sun spangle») in baltic amber

Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

Fluid inclusions in quartz with bituminous daughter minerals, China

Colour zoning in ruby from Mong-Shu, Burma