From the mines of Paprok and Kunar in Afghanistan are these beautiful natural tourmaline gemstone crystals.
1 lot of 79 carats. ($2.50/ct)
Colour: Green, blue, pink, yellow, purple, orange.
Crystal System: Hexagonal crystal system
Mineral Family: Tourmaline.
Chemical Formula: Al6B3Fe3H10NaO31Si6
Hardness (Mohs): 7-7.5
Specific Gravity: 3.02-3.26
Refractive Index: 1.616-1.65
Associated Month: October