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

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

«Red fox agate» from Patagonia, Argentina

Bubbles and swirls in moldavite (natural glass)

Two-phase inclusion in amethyst, Brazil

Colour zoning in ruby from Mong-Shu, Burma

Natural etching structure on a crystal face of diamond (trigons), polarised light

Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

Inclusion of apatite in ruby from Tanzania