10000CT Natural Black Tourmaline Pendants with 925 Sterling Silver.

300 Pieces available for sale.

Per Piece 8$.

Per piece option can be availed.

Weight:(5000CT) Per Piece(55.75CT to 26.80CT)

Scientifically, tourmaline is not a single mineral, but a group of complex crystal silicate mineral compounded with elements such as aluminum, iron, magnesium, sodium, lithium, or potassium. Tourmaline can be found in a wide variety of colors from colorless to black. This, makes tourmaline one of the most popular gems among collectors. Iron-rich tourmalines vary from black to deep brown, magnesium-rich varieties are brown to yellow, and lithium-rich tourmalines are almost any color: blue, green, red, yellow, and pink. Until recently there was no pure yellow in the rich tourmaline color spectrum. Most have a tinge of brown to them. A new vivid yellow variety, known as canary tourmaline, was found in the year 2000 in southern East Africa, in Malawi. Least valuable tourmalines are the colorless variety which is also considered as the rarest variety. Tourmaline crystals with only one color are fairly rare; tourmalines are usually bi-colour or multi-colour. Tourmaline is a typical representative of the plutonic rocks, in which are stored the volatile materials vital to its formation. However, only the black tourmalines originate from pegmatitic melts; the gem qualities are of hydrothermal origin. Common inclusions in tourmaline are cracks that run parallel to each other at 90 degrees to the length of the crystal. Thornlike fluid inclusions are another common types of inclusions that occur in tourmaline gemstone. The only acceptable type of inclusions are the tubes, that when densely packed, produce a chatoyancy and catseye effect in cabochons (the eye in catseye tourmaline can be very strong.

Tourmaline Gemstone Varieties

There are nine distinct mineral species in tourmaline mineral family, 1) Rubellite: pink or red variety of tourmaline gemstone, this is one of the most valuable and desirable gemstones of the tourmaline family. 2) Indicolite: this gemstone includes tourmaline of all shades of blue,

from the blue of sapphire to bright blue-green of turquoise. Indicolite tends to be dark in its natural look, therefore this gemstone is often heat treated to become lighter in color. 3) Schorl: This is the black variety of tourmaline family, it is rarely used as gemstone except as bead material. Schorl was widely used in Victorian England to make mourning jewellery as it is much tougher and more enduring than jet gemstone. 4) Dravite: is the yellow-brown to orange-brown variety of tourmaline gemstone family. its coloring agent is magnesium and it shows very strong dichroism effect which means it shows two different colors when viewed from different angles. Dravite gemstone is named after Drave district of Carinthia. 5) Achroite: is colorless variety of tourmaline gemstone family (Achroite is Greek

for colorless), 6) Bi- and Tricolor tourmaline: Many tourmaline gemstones consist of two, three or more colors. The most well-known combination is the watermelon tourmaline, in which the crystal has a pink center and a green rim so it looks like a watermelon in cross section. 7) Paraiba: It was first discovered in 1980 in Jose de Batalha mine in Brazil. The color ranges from green to blue and lilacs. 8) Verdelite: is the green variety of tourmaline gemstone family. 9) Uvite: is black, brown, and green variety of tourmaline gemstone family.