Midge included in amber from the Baltic coast, polarised light

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

Stress fissure («sun spangle») in baltic amber

Inclusions of hematite in feldspar (sunstone), India

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

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

Spinel crystal in dolomite marble, Burma

Fire opal, Mexico

Two-phase inclusions in tourmaline from Namibia