Stress fissure («sun spangle») in baltic amber

Inclusion of apatite in ruby from Tanzania

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 fossil plant debris in opal from Wollo, Ethiopia

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

Fire opal, Mexico

Bubbles and swirls in moldavite (natural glass)

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