From the mines of Paprok in Afghanistan are these beautiful natural tourmaline gemstone crystals.
Sold in lots of 110 carats ($1.80/ct)
Colour: Green, blue, pink, yellow, red, 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