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

Bubbles and swirls in moldavite (natural glass)

Stress fissure («sun spangle») in baltic amber

Inclusions of hematite in feldspar (sunstone), India

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

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

«Red fox agate» from Patagonia, Argentina

Fluid inclusions in quartz with bituminous daughter minerals, China

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