Big Size Facet Grade Natural Tourmaline Crystals for Cutting – 106ct

$450.00

Big size tourmaline parcel with weight of 106 carats.  Pieces of natural tourmaline crystals are from Afghanistan. The crystals are well terminated, facet grade with good thickness and open from all sides.

Colours: Bi Colour, indicolite blue colour, pink, green, Priaba like colour,
Weight: 106 carats.
Size:22.7, 16, 14.9, 10.5, 11.4, 7.3, 5.6, 8.3, 5, 1.8, 1.8, carat sizes
Treatment:No
Origin:Afghanistan

Description

Tourmaline is extremely popular among collectors and is a well-known gemstone. It is the most multicolored mineral type known, occurring in virtually every color of the spectrum. Individual stones are often multicolored and are unsurpassed in their beauty. Black tourmaline is often seen in pendants and jewelry as a glossy black stone–an experience that varies greatly from viewing it in its more natural, untumbled state.

Tourmaline Gemstone: What is it?

Stone Type/Family: A member of the Tourmaline family, Silicates class
Category: Silicate mineral group
Chemical formula: (Ca,K,Na,[])(Al,Fe,Li,Mg,Mn)3(Al,Cr, Fe,V)6(BO3)3(Si,Al,B)6O18(OH,F)4
Color: Most commonly black, but can range from brown, violet, green, pink, or in a dual-colored pink and green.
Crystal habit: Parallel and elongated. Acicular prisms, sometimes radiating. Massive. Scattered grains (in granite).
Crystal system: Trigonal
Cleavage: Indistinct
Fracture: Uneven, small conchoidal, brittle
Mohs scale hardness: 7–7.5
Luster: Vitreous, sometimes resinous
Streak: White
Specific gravity: 3.06 (+.20 -.06)
Density: 2.82–3.32
Polish luster: Vitreous
Optical properties: Double refractive, uniaxial negative
Refractive: index nù=1.635–1.675, nå=1.610–1.650
Birefringence: –0.018 to -0.040; typically about .020 but in dark stones it may reach .040
Pleochroism: typically moderate to strong

HOW TO ORDER? :

Order Online by adding cart.

SHIPMENT POLICY :

This is our first priority to ship items on items. However to due to different locations / time zones, distance and destinations from Pakistan, we always need minimum 2 working days or 1 week for handling the shipping procedure.

RETURN INSTRUCTIONS:

Once the items is received, the return policy is for 10 days in following conditions:-

  1. Items is not described as it was presented before ordering
  2. Items are defected
  3. Item quantity is less than ordered.

IMPORT CLEARANCE WILL BE RESPONSIBILITY OF IMPORTER HOWEVER WE WILL HELP IN DOCUMENTATION ON OUR SIDE.
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Additional information

Weight 100 g

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