Dumortierite in rock crystal, Brazil, polarised light

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

Two-phase inclusions in sapphire, Sri Lanka

Fluid inclusions in quartz with bituminous daughter minerals, China

Fire opal, Mexico

Inclusions of hematite in feldspar (sunstone), India

Twin-crystal of chrysoberyl

Agate from Anzi, Maroc

Agate from Reichweiler, Germany