|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
MINERAL GEM WORL D
TOURMALINE MUSHROOM SPECIMEN
This is a fine tourmaline crystal mined in the Molo district in Burma showing an interesting botryoidal shape
TOURMALINE BIRTHSTONE FOR OCTOBER.
NATURAL UN HEATED
MOHS SCALE 7-7.5
WEIGHT 66.10 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.
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|Starts||29th Oct 2012 11:18pm PDT|
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