Dendrites in agate

«Red fox agate» from Patagonia, Argentina

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Fire opal, Mexico

Stress fissure («sun spangle») in baltic amber

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

Midge included in amber from the Baltic coast, polarised light

Twin-crystal of chrysoberyl

Inclusions of fossil plant debris in opal from Wollo, Ethiopia