Inclusions of hematite in feldspar (sunstone), India

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

Colour zoning in ruby from Mong-Shu, Burma

Inclusion of apatite in ruby from Tanzania

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Fire opal, Mexico

Spinel crystal in dolomite marble, Burma

Agate from Anzi, Maroc

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan