Agate from Anzi, Maroc

Spinel crystal in dolomite marble, Burma

Two-phase inclusions in sapphire, Sri Lanka

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Twin-crystal of chrysoberyl

Agate from Reichweiler, Germany

Stress fissure («sun spangle») in baltic amber

«Red fox agate» from Patagonia, Argentina

Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers