Fluid inclusions in quartz with bituminous daughter minerals, China

Two-phase inclusions in tourmaline from Namibia

Colour zoning in ruby from Mong-Shu, Burma

Inclusions of hematite in aquamarine, Tanzania

Natural etching structure on a crystal face of diamond (trigons), polarised light

Inclusions of gilalite aggregates in rock crystal from Brazil

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Two-Phase inclusions and rutile needles in rock crystal from Brazil

Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil