The Very Highest Quality Tourmaline Information...

TourmalineBack to A - Z IndexChard 24 Carat Home Page

6x4 Oval Tourmaline
6x4 Oval Tourmaline

Multi-Coloured Tourmaline
Multi-Coloured Tourmaline

3mm Round Pink Tourmaline
3mm Round Pink Tourmaline

Tourmaline is generally thought of as green, but can be almost any colour, indeed some tourmalines display two or more colours within the same crystal. Because of the naturally occurring shape, tourmalines are often cut as long baguettes, emerald cuts, or ovals. Large size tourmalines are more relatively common compared with other gemstones, so they are ideal for large jewellery pieces. As with all gemstones, the most attractive colours and qualities are more expensive than lower qualities, and large desirable pieces are not cheap.

Tourmaline exists in more colours than any other gemstone. The most common colour is a dark green, but bright green chrome tourmalines are seen, as are blue, red, pink, orange, yellow, colourless, brown, violet and black. Strongly coloured pink tourmaline is sometimes called rubellite.

Chatoyancy or chatoyance, literally from French means cat's eye. Seen best in cat's eye chrysoberyl, but also found in a few other gemstones including tourmaline.

Technical Information
Chemical Composition and Name  - Complex Aluminium Borosilicate
Hardness7.0 to 7.5
Refractive Index1.616 - 1.634 to 1.630 - 1.652
Bi-refringence0.014 to 0.021
Other Optical PropertiesUniaxial
Optic SignNegative
Specific Gravity3.02 - 3.26
Crystalline SystemTrigonal

GemstoneWeightShapeSize & DescriptionAvailablePrice £ Price $
Green Tourmaline0.39Oval6x4Yes£18.00$Ask
Multi-Coloured Tourmaline0.96Octagon6.5x5 Yes£24.00$Ask
Pink Tourmaline0.11Round3 Yes£12.00$Ask the Lowest Possible Price

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