MINERAL GEM WORL D

TOURMALINE MUSHROOM  SPECIMEN

This is a fine tourmaline crystal mined in tje  Molo district in Burma showing an interesting botryoidal shape   

TOURMALINE BIRTHSTONE FOR OCTOBER.

NATURAL UN HEATED

MOHS SCALE 7-7.5

WEIGHT  66.34 CTS

SIZE 27x22x18   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.