|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
This is a natural tourmaline mined in Brazil.This specimen comes from a mine where a lot of Parabia production comes from. This stone has a irredesent dispaly from mica sheets in the stone.We have cut some and they make a interesting stone with a lot of character.It may also be kept as a intriguing specimen.
Weight 41.81 cts app
Size 35 x 15 x 12 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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