epinl's blog: "wholesale beads"

It is said that the color of the tourmaline crystals up to 15 kinds of complex color as much color to colorless, rose red, pink, red, blue, green, yellow, brown and black. Which is more transparent shiny blue, fresh red roses and pink plus green complex color for the top grade. Tourmaline colorful, varied and high transparency, very popular since ancient times. Tourmaline is currently second only to diamonds, rubies, sapphire, emerald colored stones. Tourmaline products, the same as with other gemstones, color gloss, transparency, inclusion, or not defective and weight as the basis of evaluation and selection. But tourmaline brittleness, so when the wearer should be noted that to avoid the collision.
The right gem, tourmaline is the name of the ethnic groups, but under the classification of the GIA (Gemological Institute of American) of tourmaline can be divided into:
Red Bi Yuxi (Rubellite), green Bi Yuxi (Verdelite), blue Bi Yuxi (Indicolite), Black Bi Yuxi (Schorl), Purple Bi Yuxi (Siberite), colorless Bi Yuxi (Achroite), two-color Bi Yuxi (of Bi-on Colored), watermelon tourmaline (Watermelon) Cat's Eye Bi Yuxi (of Cat's eye), sodium magnesium Bi Yuxi (Dravite), Alexander discoloration Bi Yuxi (the Color-change), calcium lithium Bi Yuxi (Liddicoatite), containing chromium Bi Yuxi (Chrome) and Parra according to Babi Xi (Paraiba) fourteen kinds of .
With the value of the gem-Bi Yuxi almost produced from pegmatite, tourmaline origin distribution is very wide, but now the market Bi Yuxi mostly from Brazil, there are Tanzania, Kenya, Madagascar, Mo three nasal g, Namibia, Afghanistan, Pakistan, Sri Lanka, Italy, California, USA, and Myanmar, and even mainland China, Xinjiang and Yunnan also.