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General Chemical composition :
(Na,Ca)(Mg,Li,Al,Fe2+)3Al6B3Si6(OH)4
Hardness on
Mohs’ Scale : 7 - 7½
The name “Tourmaline” is derived from
the Singhalese expression “tura mali”
which means “mixed colored stones”.
Tourmalines exhibit a unique spectrum of
colors which is second to none in
gemstone kingdom. It’s nearly universal
popularity is based on the above quality
and also are of acceptable quality and
affordable to most buyers. Tourmaline
occurs in all colors especially red,
green and multicolor. It has been
scientifically proven that Tourmaline is
not a single mineral, but a group of
minerals related in physical and
chemical properties.
Tourmalines are mined in many places in
the world. There are important
occurrences in Brazil, Sri Lanka
Nigeria, Zimbabwe, Kenya, Tanzania,
Mozambique, Madagascar, Pakistan and
Afghanistan. Tourmalines are also found
in the USA, first of all in Maine and
Utah. Although there are rich
occurrences of Tourmalines worldwide,
but high grade and fine colors are very
rare to come by.
All our gemstones are completely
natural and never treated in any form. |
I have been delighted by the service
provided by Adron Gems. The emeralds supplied
are exactly as described, with no
exaggerated claims. They not only supply the goods, but provide helpful
customer service; taking time to
understand your requirement and
providing additional descriptions. In my dealings with Adron
Gems I have found them to be both honest
and trustworthy. I have no hesitation in
recommending their business to other
customers – David Schuster
(UK)
Hello,
Thank you very much. I got your Emerald.
I'm sorry. I didn't inform you about
that. And nice Emerald, thank you very
very much. I will cut this and make a
pendant for my daughter. Have a nice
day!
Best my regards,
- Tazuyo
Ozaki (Japan) |
