Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Inclusions of hematite in aquamarine, Tanzania

Colour zoning in ruby from Mong-Shu, Burma

Twin-crystal of chrysoberyl

Two-phase inclusions in tourmaline from Namibia

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

Two-phase inclusion in amethyst, Brazil

Spinel crystal in dolomite marble, Burma

Inclusions of gilalite aggregates in rock crystal from Brazil