Inclusions of hematite in feldspar (sunstone), India

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

Twin-crystal of chrysoberyl

Partially etched diamond crystal

Two-phase inclusion in amethyst, Brazil

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

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

Bubbles and swirls in moldavite (natural glass)

Midge included in amber from the Baltic coast, polarised light