Inclusion of apatite in ruby from Tanzania

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

Colour zoning in ruby from Mong-Shu, Burma

Two-phase inclusion in amethyst, Brazil

Fluid inclusions in quartz with bituminous daughter minerals, China

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Inclusions of hematite in aquamarine, Tanzania

Agate from Reichweiler, Germany

Stress fissure («sun spangle») in baltic amber