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

Dendrites in agate

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

Structure in a healing fissure in topaz from Brazil

Two-Phase inclusions and rutile needles in rock crystal from Brazil

Agate from Reichweiler, Germany

Two-phase inclusions in sapphire, Sri Lanka

Stress fissure («sun spangle») in baltic amber

Colour zoning in ruby from Mong-Shu, Burma