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

Structure in a healing fissure in topaz from Brazil

Inclusions of hematite in aquamarine, Tanzania

Inclusion of apatite in ruby from Tanzania

Fluid inclusions in quartz with bituminous daughter minerals, China

Inclusions of gilalite aggregates in rock crystal from Brazil

Bubbles and swirls in moldavite (natural glass)

Dumortierite in rock crystal, Brazil, polarised light

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