Tourmaline crystallization on a quartz base
Weight 3.1 kg
| CHARACTERISTICS | |
| Weight | 3100 gr. 3.1 kg |
| Size | max 16 cm 160x120x80 mm |
| Reference | 211207000 |
| Mineral | group of minerals Tourmaline |
| Category | Crystals and geodes |
| Group | Crystals on ganges |
| Country |
 Madagascar
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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% | |||
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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.
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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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Paypal
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Amex
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Virement
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