Tourmaline bardzo rzadka odmiana turmalinu w kolorze seledynowym
roznych odcieniach, kamienie z duzymi wtretami mimo to osiagaja
zawrotne ceny, absolutny RARYTAS jubilerski i kolekcjonerski. Nawet
najslabsze kamienie osiagaja bardzo wysokie ceny!!
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Small, rare and very valuable are those copper-containing
Tourmalines mined at the Mina da Bathalha in the Brasilian state of
Paraiba. The vivid turquoise blue to green colours are not shown by
any other gemstone in the world, The exclusive uniqueness of the
legendary occurrence make these rare gemstones real treasures.
"Paraiba" – the word as such holds a special charm and attraction
for gemstone lovers, after all, this is the denomination of a
gemstone showing an exceptional, almost electric blue to green
shades. It was discovered not long ago, to be precise: in the 1980s.
The world owes this sensational find to an individual man and his
unshakeable belief: to Heitor Dimas Barbosa. Never tiring, he had
been digging with his helpers for years in the pegmatite layers of a
small mountain range in the state of Paraiba in Brazil.
Heitor Dimas Barbosa was not just simply a gemstone prospector, and,
first of all: he was not searching for something known. He was
deeply convinced that somewhere under the famous "Paraiba" hill
there was hidden something "completely different" – and in the end
his vision proved to be right. As early as 1981 he had started with
the first preliminary steps for excavations in old abandoned mines.
Hole after hole was driven into the hard soil – but in vain. However,
all of a sudden, five and a half years after the first digging, in
the labyrinth of shafts and passages there showed the first hints of
a Tourmaline occurrence. Finally in autumn 1989 a handful of finest
Tourmaline crystals was brought to the light of day from one of the
many dark passages. These crystals showed colours which had never
been dreamt of before. Unfortunately the "Father of the Paraiba
Tourmaline” had to recover from an illness at this time, and could
not be there at the mines. The rough crystals were sold without him
ever setting eyes on them. After the find had become publicly known,
the most adventurous stories happened at the mines. For a period of
another five years the relatively small mountain range measuring
only 400 m in length, 200 m in width and 65 m in height, had been
turned into a virtual honeycomb of shafts and tunnels, and the
mountain had almost been levelled. But in vain. And by now, nobody
expects another find any more.
Copper makes the
Brazil is the classical Tourmaline country. This multi-coloured
gemstone family shows practically all the colours of the rainbow.
However, a brilliant turquoise shade had always been missing for a
long time – until the valuable find was made at Paraiba.
Usually it is traces of iron, manganese, chromium and vanadium which
are responsible for giving Tourmalines their many beautiful colours.
But this is quite different for the rare Paraiba Tourmaline: it owes
its spectacular colour to copper, an element which had not shown up
in Tourmalines before. There is a clear part of its weight made up
by copper. In addition, it often also contains manganese as
scientists have found out.
The combination of these two elements causes a wide range of
beautiful and fascinating colours in Paraiba Tourmalines: emerald
green, turquoise to sky-blue, sapphire blue, indigo blue, dark
purple to red purple. Certain mixtures of copper and manganese may
also result in pale grey to purplish-blue colours. A high
concentration of copper is responsible for the much coveted
brilliant blues, turquoises and greens, while purples and reds are
caused by manganese. By heating the stones, experienced cutters are
able to eliminate the red traces, so that only the bright copper
colour will show.
The exceptionally vivid character of Paraiba Tourmalines , however,
can only be appreciated after the stone has been cut. When it has
been faceted, a unique fire and brilliance is displayed, which makes
the stone seem to glow and shine from within even when there is
little light. Therefore the colour is often characterised as "electric"
or "neon". Fresh and full of energy is the charm and attraction of
these treasures of Nature. A Paraiba Tourmaline in "swimming-pool
blue” is the epitome of vividness and easy to discern even for an
Paraiba Tourmalines are almost always very small, as the beautiful
copper-containing Tourmaline crystals mined in the "fine hill” at
Paraiba were almost exclusively fragments and splinters. Larger,
unfragmented rough stones weighing over 5 gram were rare, and only
very few achieved weights of more than 20 gram. Therefore you will
hardly find a larger Paraiba Tourmaline at a jeweller’s or gemstone
trader’s, besides, only a select few of these will even carry this
kind of stone.
The beauty and vividness of colour shown by Paraiba Tourmalines gave
reason to enthusiasm for the gemstone world . Within only a short
period considerable popularity had been gained, and these stones
today belong to the most coveted and most expensive stones in the
world. Prices continue to go up, and in the meantime they have
reached such regions which used to be considered utopian for
Tourmalines in the past. Five digit carat prices are asked and paid
for fine, larger Paraiba Tourmalines. The market almost completely
and immediately soaked up the limited offer of rough stones. This is
easy to understand, for here Nature created a gemstone which is
second to none concerning colour, brilliance and luminosity. And
without Heitor Dimas Barbosa and his vision to find "something
completely different", it probably would not exist on the market at
Is Paraiba situated in
The Paraiba story should actually end here. But Nature always holds
some surprises for all of us. The story was in fact continued in the
beginning of 2001, but the setting was in quite another part of the
world. Suddenly in 2001 there appeared brilliant bluish-green
Tourmalines from Nigeria on the market, similar to those which had
been known from Paraiba. It was a perfect scoop: just like the
Paraiba Tourmalines these stones show their real beauty after being
heated carefully. In general their colours seem a little lighter,
but the difference is hardly discernible for somebody who is not an
expert. Also the scientists find it difficult to come up with
characteristic features which differ between Tourmalines from
Nigeria and Paraiba respectively. The copper-containing mines in
Nigeria explain the similarity in chemical components. Both specimen
owe their colour to copper and manganese. How is that possible? Has
Paraiba moved to Africa? Well, of course not. But this example of a
valuable gemstone clearly illustrates the phenomenon of the
continental drift. We only have to consult a card and compare the
silhouettes of the African and the South American continent. If we
project the coastline of South America onto Africa, both elements
fit like in a jigsaw puzzle. And Nigeria would then be directly
linked to north-east Brazil. Probably the brilliant and bright
copper Tourmalines from Nigeria were created under the same
conditions as the Paraiba ones, before the continents drifted apart.
Is that the explanation why they are so difficult to tell apart?
This will remain one of the mysteries and secrets in the world of
gemstones. And gemstone lovers will be happy that African
Tourmalines in vivid green-blue offer an alternative on the market
to the legendary Paraiba Tourmalines.