Inclusions of hematite in aquamarine, Tanzania

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

Colour zoning in ruby from Mong-Shu, Burma

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

Dendrites in agate

Inclusions of hematite in feldspar (sunstone), India

Bubbles and swirls in moldavite (natural glass)

Agate from Anzi, Maroc