79

Polished natural tourmaline inclusion block

Weight 1.4 kg
CHARACTERISTICS
Weight 1400 gr. 1.4 kg
Size max 11 cm 105x110x80 mm
Reference 211106463
Mineral group of minerals Tourmaline
Category Decoration stones
Group Free forms
Country Country Madagascar Madagascar
Contractual photos showing the object you will receive when ordering. the photos were taken in order to obtain the most faithful possible rendering of the object.
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Formula NaFe2+3 Al6 ((OH)4 (BO3)3 Si6O18)] TOURMALINE
O Oxygen Other no metal 40%
Si Silicon Metalloids 32%
B Boron Metalloids 10%
Al Aluminum Poor metal 7%
Fe Iron Transition metal 6%
Na Sodium Alkali metal 1%
Mg Magnesium Alkaline earth metal 1%
Li Lithium Alkali metal 1%
K Potassium Alkali metal 1%
H Hydrogen Other no metal 1%
100%
Tourmaline is a complex mineral, a member of the silicate group, more precisely cyclosilicates. It is characterized by a wide variety of colors, ranging from black to green, pink to red, blue to brown, and even colorless, which is due to its varied chemical composition and the presence of impurities. Tourmaline has a hardness of 7 to 7.5 on the Mohs scale, making it strong enough to be used in jewelry. It has uneven breakage, a vitreous luster, and a specific gravity between 2.82 and 3.32. A remarkable characteristic of tourmaline is its pyroelectricity: when heated, it acquires an electrical charge, which can attract dust particles.

Shipping time
Your orders are usually shipped the day of the order and at the latest after 2 working days.

Delivery delay
Once the package is supported by the postal service, delivery times are those announced by the Post (letter followed or Colissimo followed). Parcel shipping from France.

Returns and Refund
Our refund and return policy lasts 14 days. You can read the details on the "return and delivery" page.

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