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

Stress fissure («sun spangle») in baltic amber

Bubbles and swirls in moldavite (natural glass)

Inclusion of apatite in ruby from Tanzania

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

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

Agate from Reichweiler, Germany

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Inclusions of fossil plant debris in opal from Wollo, Ethiopia