Agate from Reichweiler, Germany

Inclusions of gilalite aggregates in rock crystal from Brazil

Two-phase inclusions in sapphire, Sri Lanka

Inclusions of hematite in feldspar (sunstone), India

Two-phase inclusion in amethyst, Brazil

Inclusion of apatite in ruby from Tanzania

Stress fissure («sun spangle») in baltic amber

Agate from Anzi, Maroc

Inclusions of fossil plant debris in opal from Wollo, Ethiopia