Inclusions of hematite in aquamarine, Tanzania

Inclusion of apatite in ruby from Tanzania

«Red fox agate» from Patagonia, Argentina

Stress fissure («sun spangle») in baltic amber

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

Agate from Anzi, Maroc

Two-phase inclusions in sapphire, Sri Lanka

Dendrites in agate

Twin-crystal of chrysoberyl