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

Agate from Anzi, Maroc

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

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

Two-phase inclusion in amethyst, Brazil

Dendrites in agate

Fire opal, Mexico

Spinel crystal in dolomite marble, Burma

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