Inclusions of fossil plant debris in opal from Wollo, Ethiopia

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

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

Dumortierite in rock crystal, Brazil, polarised light

Two-phase inclusions in tourmaline from Namibia

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

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

Inclusions of hematite in feldspar (sunstone), India

Colour zoning in ruby from Mong-Shu, Burma