Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Inclusions of gilalite aggregates in rock crystal from Brazil

Stress fissure («sun spangle») in baltic amber

Inclusion of apatite in ruby from Tanzania

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

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

Bubbles and swirls in moldavite (natural glass)

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

Twin-crystal of chrysoberyl