Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Twin-crystal of chrysoberyl

Inclusions of gilalite aggregates in rock crystal from Brazil

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

Partially etched diamond crystal

Midge included in amber from the Baltic coast, polarised light

Stress fissure («sun spangle») in baltic amber

Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

Inclusions of fossil plant debris in opal from Wollo, Ethiopia