Inclusions of hematite in feldspar (sunstone), India

Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil

Fluid inclusions in quartz with bituminous daughter minerals, China

Two-phase inclusion in amethyst, Brazil

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

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

Fire opal, Mexico

Dendrites in agate

Two-phase inclusions in sapphire, Sri Lanka