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

Two-phase inclusions in tourmaline from Namibia

Midge included in amber from the Baltic coast, polarised light

Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers

Two-phase inclusion in amethyst, Brazil

Stress fissure («sun spangle») in baltic amber

Inclusions of hematite in aquamarine, Tanzania

Colour zoning in ruby from Mong-Shu, Burma

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