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

Two-Phase inclusions and rutile needles in rock crystal from Brazil

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

Colour zoning in ruby from Mong-Shu, Burma

«Red fox agate» from Patagonia, Argentina

Bubbles and swirls in moldavite (natural glass)

Two-phase inclusion in amethyst, Brazil

Dumortierite in rock crystal, Brazil, polarised light

Partially etched diamond crystal