TOURMALINE ROUGH SPECIMEN

  This  rough specimen has been weathered has two of the most sought after colours in Tourmaline GREEN and PINK

TOURMALINE BIRTHSTONE FOR OCTOBER.

NATURAL UN HEATED

MINED IN BRAZIL 

MOHS SCALE 7-7.5

WEIGHT  51.55 CTS

SIZE 30x17x12  MM

 Tourmaline is a crystal silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline gem stones come in a wide variety of colors.Tourmaline has a variety of colors. Usually, iron-rich tourmalines are black to bluish-black to deep brown, while magnesium-rich varieties are brown to yellow, and lithium-rich tourmalines are almost any color: blue, green, red, yellow, pink etc. Rarely, it is colorless. Bi-colored and multicolored crystals are common, reflecting variations of fluid chemistry during crystallisation. Crystals may be green at one end and pink at the other, or green on the outside and pink inside: this type is called watermelon tourmaline. Some forms of tourmaline are dichroic, in that they change color when viewed from different directions.