Cyclosilicates
Tourmaline on Gneiss
Tourmaline on Gneiss
Aydın, Türkiye
Pink Tourmaline
Pink Tourmaline
Chemical Formula : Al6B3Fe3H4NaO31Si6
Mohs Scale : 7 - 7.5
Crystal Structure : Trigonal (Rhombohedral)
Aquamarine
Aquamarine
Chemical Formula : Be3Al2Si6O18
Mohs Scale : 7.5 - 8
Crystal Structure : Hexagonal
Black Tourmaline ( Schorl )
Black Tourmaline ( Schorl )
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.
Emerald
Emerald
Chemical Formula : Be3Al2(SiO3)6
Mohs Scale : 7.5 - 8
Crystal Structure : Hexagonal
Tourmaline
Tourmaline
Tourmaline in Quartz
Tourmaline in Quartz
Tourmaline
Tourmaline