48^€

Polished Tourmaline Rock

Weight 930 gr

CHARACTERISTICS
Weight	930 gr
Size	75x50x35 mm
Reference	240913970
Mineral	group of minerals Tourmaline
Category	Decoration stones
Group	Free forms
Country	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 group of minerals belonging to the silicate family. Its complex chemical formula reflects its crystalline structure and variable composition. This variability explains the range of colors that tourmaline can present, from black to red, through green, blue and pink. The chemical elements present in the crystalline structure, such as iron, manganese or chromium, are responsible for this chromatic diversity. Tourmalines form in a variety of geological environments, including igneous rocks, metamorphic rocks, and hydrothermal veins. They are often associated with other minerals such as quartz, feldspar, or mica. Tourmaline crystals can occur in a variety of shapes, ranging from needles to columns, and can reach impressive sizes. Tourmaline is hard, wear-resistant, and has a vitreous luster. In jewelry, tourmaline is valued for its beauty and variety of colors. It is faceted and used to make jewelry such as rings, pendants, and earrings.

Return and delivery

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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