Midge included in amber from the Baltic coast, polarised light

Dendrites in agate

Agate from Reichweiler, Germany

Agate from Anzi, Maroc

Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

Twin-crystal of chrysoberyl

Bubbles and swirls in moldavite (natural glass)

Fire opal, Mexico

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania