Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Dumortierite in rock crystal, Brazil, polarised light
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Inclusion of apatite in ruby from Tanzania
Stress fissure («sun spangle») in baltic amber
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers

Imprint

The provider of this website is:

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

E. nfgmmlgch

Web development: Gecko Media