Inclusions of gilalite aggregates in rock crystal from Brazil
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Agate from Reichweiler, Germany
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Natural etching structure on a crystal face of diamond (trigons), polarised light
Stress fissure («sun spangle») in baltic amber

Imprint

The provider of this website is:

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

E. nfgmmlgch

Web development: Gecko Media