Dendrites in agate

Bubbles and swirls in moldavite (natural glass)

Inclusions of hematite in feldspar (sunstone), India

Inclusions of gilalite aggregates in rock crystal from Brazil

Two-phase inclusions in sapphire, Sri Lanka

Fluid inclusions in quartz with bituminous daughter minerals, China

Inclusion of apatite in ruby from Tanzania

Midge included in amber from the Baltic coast, polarised light

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