Inclusions of gilalite aggregates in rock crystal from Brazil

Two-phase inclusion in amethyst, Brazil

Inclusions of hematite in feldspar (sunstone), India

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

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

Agate from Reichweiler, Germany

Twin-crystal of chrysoberyl

Structure in a healing fissure in topaz from Brazil