Colour zoning in ruby from Mong-Shu, Burma

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

Spinel crystal in dolomite marble, Burma

Twin-crystal of chrysoberyl

Fluid inclusions in quartz with bituminous daughter minerals, China

Agate from Reichweiler, Germany

Partially etched diamond crystal

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan