Inclusion of apatite in ruby from Tanzania

Stress fissure («sun spangle») in baltic amber

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Dendrites in agate

Two-phase inclusion in amethyst, Brazil

Midge included in amber from the Baltic coast, polarised light

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

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

Fire opal, Mexico