It's a Natural Faceted Emerald Cut Bi-color Tourmaline Loose Gemstone From Afghanistan

• WEIGHT(ct): 6.90

• Size : 20.5x7x5.5 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