«Red fox agate» from Patagonia, Argentina

Colour zoning in ruby from Mong-Shu, Burma

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Twin-crystal of chrysoberyl

Dendrites in agate

Fire opal, Mexico

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 gilalite aggregates in rock crystal from Brazil