Member of International Coloured stone asociation commited to full disclouser of  stone with money back guarantee

SEDAGEMS

TOURMALINE BIRTHSTONE FOR OCTOBER.

Sent with a display certificate and plastic cover

NATURAL GEM - NO TREATMENTS

MINED IN BRAZIL 

GRADING  VS

MOHS SCALE 7-7.5

WEIGHT 1.34 CTS

SIZE 7.10 x 7.00 x 4.55 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.