| Gewicht | 0,005 kg (5 gr) |
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| Dimensions | 1 × 1,3 × 4 cm |
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| SKU | 4300 |
Zwarte Toermalijn Dubbeleinder Hanger | Goudkleurig – 3,2 cm
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Black Tourmaline Double Butterfly Pendant from China
Tourmaline
Tourmaline is a group of borosilicate minerals with a complex chemical composition and a wide variety of colours. It occurs in virtually every colour of the rainbow, including pink, green, blue, black and multi-coloured combinations. This variety makes tourmaline one of the most popular gemstones in the jewellery world.
Tourmaline usually forms in pegmatites and metamorphic rocks. Major deposits include Brazil, Afghanistan, Mozambique, Nigeria and the United States. The chemical formula varies, but a general form is (Ca,K,Na)(Al,Fe,Li,Mg,Mn)₃(Al,Cr,Fe,V)₆(BO₃)₃(Si,Al,B)₆O₁₈(OH,F)₄. The hardness is between 7 and 7.5 on the Mohs scale.
Popular varieties include black tourmaline (schörl), pink tourmaline (rubellite), green tourmaline (verdelite) and watermelon tourmaline (pink interior, green rim).
Sources:
Mindat.org, Gemdat.org, Wikipedia - Tourmaline
Double-Binder Pendants
The stone cut into double-cylinder is fixed in a silver- or gold-coloured holder with eye. The double-inder has a length of about 3.2 cm, measured without the eye. These pendants are available in various stone types and are supplied individually. Due to the use of natural stone, colour, markings and finish may vary slightly from one pendant to another.
