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Tourmaline Tumblestones (Black)£2.50
Tourmaline Bracelets (Black)£2.95
Tourmaline Bracelets (Mixed)£3.95
Tourmaline Cabochons£1.25 – £5.95
Tourmaline Crystals (Mixed)£1.95
Tourmaline Crystals (Green)£1.45 – £3.95
Tourmaline Crystals (Rubellite)£9.00
Tourmaline Crystals (Watermelon)£4.95
Tourmaline specimens (Black in Quartz)£3.95 – £5.95
Tourmaline specimens (Blue in Quartz)£9.75
Tourmaline specimens (Green in Quartz)£9.95 – £15.00
Tourmaline Specimens / Rough (Black)£1.25
Tourmaline, faceted£2.95 – £14.95
Appearance, Uses and History
Tourmaline is pretty much exclusively used as a gemstone and is both one of the best loved and most recognised. The name refers to an informal group of boron silicate minerals, which all have inclusions or traces of various other elements causing colours.
The name allegedly derives from a Tamil word, ‘thoramalli’, which refers to a group of gemstones found in the Indian subcontinent.
Gem quality Tourmaline comes from a few locations worldwide, with a lot of the mining being done in Brazil, Africa, and the USA.
Tourmaline occurs all around the world, although there are some locations with particularly gemmy specimens that collectors will be interested in.
Excellent quality crystals can be found in Afghanistan, Australia, Austria, Brazil, Bulgaria, Canada, China, Czechia, the Congo, Finland, India, Kazakhstan, Kenya, Madagascar, Mozambique, Myanmar, Namibia, Nepal, Nigeria, Pakistan, Russia, Spain, Tanzania, the USA, Vietnam, and Zimbabwe.
Tourmaline can occur in clear, blue, red, green, yellow, orange, brown, pink, purple, black, multicoloured – honestly, the most colourful gemstone there is.
- Achroite is a relatively rare colourless form of Tourmaline.
- Cats Eye Tourmaline is any form of Tourmaline with the ‘cats eye’ optical effect, a form of chatoyancy.
- Chrome Tourmaline (or Chrome Dravite) is a form of Tourmaline which gains its colour from traces of Chromium.
- Dravite is often known as the ‘brown Tourmaline’, although it does occur in green and green-brown too. It is very difficult to distinguish from Uvite.
- Elbaite is the most widely used form of gem Tourmaline, and occurs in a huge number of colours. It is often bicolour or multicoloured.
- Indicolite is a variety of blue Tourmaline.
- Paraiba Tourmaline is a neon blue to neon blue-green form, and incredibly prized!
- Rubellite is a pink to red variant, very popular with jewellers.
- Schorl is the most common form of Tourmaline, a lustrous black mineral. It is not often used for jewellery, but is prized by collectors, especially when combined with other minerals.
- Uvite is a rare green to green-brown ariety of Tourmaline. It is very difficult to distinguish from Dravite.
- Watermelon Tourmaline is a multicoloured Tourmaline with a pink centre surrounded by a green layer, resembling a cut slice of watermelon.
Photos of Rubellite (red/pink Tourmaline)
Photos of Indicolite (blue Tourmaline)
Photos of Elbaite (Bicolour, mixed colour, and various coloured Tourmaline)
Photos of Dravite (Green-brown Tourmaline)
Photos of Schorl
Photos of Uvite (Green, red, brown Tourmaline)
Hazards and Warnings
Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis.
When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.
Mandarin and Traditional Chinese:
- ٹور لائن
Further Reading / External Links