Green Tourmaline

TUU3
New

Product: Natural Tourmaline, Shape: Baguette, Color: Green, Size: 15.00x3.90x3.00, Weight: 1.80 carats, Stone clarity: No visible inclusions, Origin: Pakistan

check In Stock
Hurry! only 1 items left in stock.
125.00 lei
Livrare in 1-3 zile
Quantity

In stock
  Secure payments

Our payment protection policy

  Delivery of products

Our delivery conditions

  Return policy

Order return policy

Tourmaline is a semi-precious crystal with a variable chemical structure, a complex silicate of aluminum and boron. Instead of aluminum atoms, atoms of sodium, calcium, magnesium, iron, lithium, etc. can be substituted in various proportions, causing variations in the physical properties of the crystal. Tourmaline is part of the minerals with the trigonal crystallization system. The chemical formula shows that hydroxyl ions (-OH) and fluoride ions (-F) can combine in different mixing ratios with metals, this mixture determining the color and hardness of the mineral (between 7 and 7.5).

Tourmaline colors are very varied, from blue, green, red, pink, brown, to black, sometimes a crystal can have several colors; in cross section some crystals appear as agate with concentric circular lines of different color. In tourmalines, the phenomenon of pleochroism can often be observed, i.e. the change of color depending on the direction of observation. The most common pleochroism is blue to black.

Another property of tourmaline crystals is piezoelectricity, which is manifested by the electric polarization of the crystal as a result of a mechanical action (pressure or torsion) applied on a certain axis of it. Also, most varieties of tourmaline also show the property of pyroelectricity, that is, the appearance of an electrical polarization following heating or cooling of the crystal. Tourmaline is the first material in which these two properties have been observed.

The term tourmaline arrived in the Romanian language from other European languages (in German Turmalin, French tourmaline). But at its origin is the Sinhalese word (the majority language spoken in Sri Lanka) turamali, meaning "ash-attracting stone", which reflects the pyroelectric properties of tourmaline.

: TUU3
: 1 Item
Hurry! only 1 items left in stock.
New

Data sheet

Stone type
Natural Tourmaline
Shape
Baguette
Colour
Dark green
Stone size mm
15.00x3.90x3.00
Weight carat
1.80
Stone Clarity
Eye clean
Treatment
No treatments
Source
Pakistan
Sale information
Price by piece
Supplier
Gold and Gems

Shipping cost in Romania

  • The displayed delivery costs can be changed without prior notice depending on the requests of the shipping companies
  • For orders with a minimum value of 500 lei shipping is free