Inclusions of hematite in feldspar (sunstone), India

Inclusions of hematite in aquamarine, Tanzania

Partially etched diamond crystal

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

Two-phase inclusion in amethyst, Brazil

Twin-crystal of chrysoberyl

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

«Red fox agate» from Patagonia, Argentina

Fire opal, Mexico