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

Fire opal, Mexico

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

Stress fissure («sun spangle») in baltic amber

Fluid inclusions in quartz with bituminous daughter minerals, China

Two-phase inclusions in sapphire, Sri Lanka

Inclusions of hematite in feldspar (sunstone), India

Structure in a healing fissure in topaz from Brazil