• Manager£ºJiujun Li
  • Mobile£º+86-13903119840
  • Phone£º+86-0311-88708888
  • Fax£º+86-0311-88709840
  • E-mail£º86234885@163.com
  • Skype£ºsjz139
  • MSN£ºsjz139@hotmail.com
  • Address£ºYuhua District In
  •       Shijiazhuang No.68 Road
  •       side (b plant North)

Black Tourmaline feijinshukuangchan@hotmail.com

Packaging & Delivery

Packaging Detail: Transport packaging is decided by both sides through consultation
Delivery Detail: The advance payment received within 15 days after the delivery.

Specifications

Tourmaline
1.tourmaline rough
2.size: 3x7x10mm chips
3.Natural tourmaline stone beads

Product Introduction:

 

Name:Tourmaline

Category: cyclosilicate

Size: 10-20mesh 20-40mesh 200mesh 325mesh

Color: Most commonly black, but can range from brown, violet, green, pink, or in a dual-colored pink and green

Quality: Natural

Identification: ISO9001:2000

Packaging: 25-50KG/bag, or 1MT/bag, and packing can be customized

 

Specification:

 

Density

2.82-3.32

Hardness

7-7.5

Crystal habit

Parallel and elongated. Acicular prisms, sometimes radiating. Massive. Scattered grains (in granite)

Crystal system

Trigonal

Cleavage

Indistinct

Fracture

Uneven, small conchoidal, brittle

Luster

Vitreous, sometimes resinous

Streak

White

Specific gravity

3.06 (+.20 -.06)

Polish luster

Vitreous

Optical properties

Double refractive, uniaxial negative

Refractive index

n¦Ø=1.635¨C1.675, n¦Å=1.610¨C1.650

Birefringence

-0.018 to -0.040; typically about .020 but in dark stones it may reach .040

Pleochroism

typically moderate to strong

Red Tourmaline: Definite; dark red,light red
Green Tourmaline: Strong; dark green, yellow-green
Brown Tourmaline: Definite; dark brown, light brown
Blue Tourmaline: Strong; dark blue, light blue

Dispersion

.017

Ultraviolet

pink stones¡ªinert to very weak

Fluorescence

red to violet in long and short wave

Absorption spectra

a strong narrow band at 498 nm, and almost complete absorption of red down to 640nm in blue and green stones; red and pink stones show lines at 458 and 451nm as well as a broad band in the green spectrum

Copyright(C) Shijiazhuang glorious garden tourmaline Factory                      Admin       E-mail£º86234885@163.com Website£ºwww.51dianqishi.com
Hotline£º+86-0311-88708888 Mobile Phone£º+86-13903119840                Postcode£º050041 Address£ºYuhua District In Shijiazhuang No.68 Road side (b plant North)