Fluid inclusions in quartz with bituminous daughter minerals, China

Inclusions of gilalite aggregates in rock crystal from Brazil

Two-phase inclusions in tourmaline from Namibia

Two-Phase inclusions and rutile needles in rock crystal from Brazil

Stress fissure («sun spangle») in baltic amber

Two-phase inclusions in sapphire, Sri Lanka

Dendrites in agate

Natural etching structure on a crystal face of diamond (trigons), polarised light

Twin-crystal of chrysoberyl