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

Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

Two-phase inclusions in sapphire, Sri Lanka

Twin-crystal of chrysoberyl

Dendrites in agate

Fire opal, Mexico

Two-phase inclusions in tourmaline from Namibia

Inclusions of gilalite aggregates in rock crystal from Brazil

Colour zoning in ruby from Mong-Shu, Burma