Aydın, Türkiye

Chemical Formula : Al6B3Fe3H4NaO31Si6

Mohs Scale : 7 - 7.5

Crystal Structure : Trigonal (Rhombohedral)

Chemical Formula : Be3Al2Si6O18 

Mohs Scale : 7.5 - 8

Crystal Structure : Hexagonal

Chemical Formula : Al6B3Fe3H4NaO31Si6

Mohs Scale : 7 - 7.5

Crystal Structure : Trigonal (Rhombohedral)

• The most common species of tourmaline is schrol. 95 percent of tourmalines in nature are schorl.

Chemical Formula : Be3Al2(SiO3)6 

Mohs Scale : 7.5 - 8

Crystal Structure : Hexagonal

Tourmaline in Quartz