Two-phase inclusions in sapphire, Sri Lanka

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

Agate from Anzi, Maroc

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

Two-phase inclusions in tourmaline from Namibia

Dumortierite in rock crystal, Brazil, polarised light

Partially etched diamond crystal

Imprint

The provider of this website is:

Swiss Gemmological Society
c/o BDO SA
Hodlerstrasse 5
3001 Bern

Web development: Gecko Media

Sitemap
Imprint
Data protection
Conditions of use

© SGG/SSG 2026