Two-phase inclusion in amethyst, Brazil

Inclusions of gilalite aggregates in rock crystal from Brazil

Spinel crystal in dolomite marble, Burma

Dendrites in agate

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Colour zoning in ruby from Mong-Shu, Burma

Inclusions of hematite in feldspar (sunstone), India

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

Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers