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

Bubbles and swirls in moldavite (natural glass)

Agate from Anzi, Maroc

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

Inclusion of apatite in ruby from Tanzania

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Spinel crystal in dolomite marble, Burma

Midge included in amber from the Baltic coast, polarised light