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

Partially etched diamond crystal

Two-phase inclusions in sapphire, Sri Lanka

Inclusions of hematite in feldspar (sunstone), India

Two-phase inclusion in amethyst, Brazil

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

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

Stress fissure («sun spangle») in baltic amber