«Red fox agate» from Patagonia, Argentina

Colour zoning in ruby from Mong-Shu, Burma

Spinel crystal in dolomite marble, Burma

Structure in a healing fissure in topaz from Brazil

Two-phase inclusion in amethyst, Brazil

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

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

Twin-crystal of chrysoberyl

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