It's a Beautiful Natural Faceted Emerald Cut Greenish Blue Color Tourmaline Loose Gemstone From Afghanistan

• WEIGHT(ct): 3.40

• SIZE(mm): 12.3x5.8x5.4 mm

• CLARITY: SI

• TREATMENT: NONE

• Origin Afghanistan

• Certificate : On Demand
  

Whats is Tourmaline ?

Tourmaline is a crystalline boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone. This gemstone can be found in a wide variety of colors.

Color: Green, Black, Blue, Red, Pink, White, Yellow, Purple, Brown, Orange, Grey
Luster: Vitreous
Associated month: October
Crystal system: Hexagonal crystal system
Hardness (Mohs hardness scale): 7 – 7.5
Transparency: Opaque, Transparent