|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
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.
|Starts||29th Oct 2012 10:58pm PDT|
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