«Red fox agate» from Patagonia, Argentina

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

Stress fissure («sun spangle») in baltic amber

Structure in a healing fissure in topaz from Brazil

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

Two-phase inclusion in amethyst, Brazil

Fluid inclusions in quartz with bituminous daughter minerals, China

Inclusions of hematite in aquamarine, Tanzania

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