Colour zoning in ruby from Mong-Shu, Burma

Midge included in amber from the Baltic coast, polarised light

Inclusions of hematite in aquamarine, Tanzania

Agate from Reichweiler, Germany

Inclusions of gilalite aggregates in rock crystal from Brazil

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

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

Inclusions of hematite in feldspar (sunstone), India

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