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

Fluid inclusions in quartz with bituminous daughter minerals, China

Twin-crystal of chrysoberyl

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Agate from Anzi, Maroc

Inclusion of apatite in ruby from Tanzania

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

Structure in a healing fissure in topaz from Brazil

«Red fox agate» from Patagonia, Argentina