It's beautiful faceted natural bluish green colour tourmaline loose gemstone from afghanistan. 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. Crystal system: hexagonal crystal system. Hardness (mohs hardness scale): 7 7.5.This item is made of tourmaline.