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

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Two-phase inclusions in tourmaline from Namibia

Colour zoning in ruby from Mong-Shu, Burma

Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

Agate from Reichweiler, Germany

Dumortierite in rock crystal, Brazil, polarised light

Spinel crystal in dolomite marble, Burma

Inclusions of hematite in feldspar (sunstone), India