Two-phase inclusions in sapphire, Sri Lanka

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

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

Inclusion of apatite in ruby from Tanzania

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Structure in a healing fissure in topaz from Brazil

Colour zoning in ruby from Mong-Shu, Burma

Dendrites in agate