Gemval, an approved data
supplier for the valuation data and pricing indexes for the Market News
Service, International Trade Centre UNCTAD/WTO, Geneva, has historical
data charts and graphs indicating colored gemstones, in general,
have appreciated 26% in the past three years.
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Another
exceptional gemstone whose qualities are analogous with art
and painting. The neon glow and the blue/green peacock colors are a
perfect example of the 'Art Nouveau' movement at the of
the beginning of the 20th. century. One of the main
proponents was also the son of the founder of Tiffany. His name was
Louis Comfort Tiffany and his most famous work was the stained glass
window (see below) in St.John's church Baltmore. Rene Lalique's hood
ornament is also an iconic Art Nouveau marker I use in the presentation.
Paraiba it is the name of a high fashion gemstone
with blue to green tones of extraordinary vividness. Faceted,
they scintillate a really unusual 'fire' and appear to glow intensely
even when there is very little light. That is why their color is often
referred to as 'electric' or 'neon'.
The weight of this collector's item is a large 4.53ct
and it has an exceptionally clean VVS (GIA type
2) clarity - the color displayed on this gem is
amazing. This gem has been finished to perfection in
a brilliant stepped antique cut.
As
most folk are aware I do not offer many items on my site as I love
the gemstones I offer and only offer those with some outstanding
features. Please take the time to read my feedback in this regard.
This
tourmaline comes with a gem certificate indicating it is truly copper
and manganese bearing.
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Pieces:
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One
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Type: |
Natural Paraiba Tourmaline |
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| Color: |
dazzling green/blue |
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Shape: |
Oval |
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| Weight: |
4.53ct.
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Size: |
11.80x9.46x6.41mm |
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| Clarity: |
VVS GIA Type2 |
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Luster: |
radiant |
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| Enhancement: |
N |
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Origin: |
Madagascar |
The photographs and
movie are extreme enlargements made under sunlight or
very bright lights with a macro lens so you can observe the
gem's clarity, and of course, a magnification of any flaws. Monitors
vary so I have little control over the color on your
screen only to say these were made for a gamma corrected flat
screen monitor with colors as close as possible to the
original.
All gems have been inspected
by a qualified gemologist and are guaranteed as natural. We
at Cowdisley are committed to top customer service, and
quality material. Email is encouraged with any questions before placing
your bid. We will try to respond to email within 24hrs.
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GIA CLARITY GRADING
USED BY COWDISLEY
Different
gem labs grade clarity in colored gemstones differently. Cowdisley uses
the GIA (Gemological Institute of America) Colored Gemstone Grading
Scale. According to the GIA – perhaps the world’s best known and
trusted Gem Association and Lab, there are THREE different charts for
grading colored gemstones (and Diamonds). Perhaps the one that most
jewelers are familiar with is the Type 1 Gemstone Chart, which includes
the grading of Diamonds. The Chart that a gemstone is graded in is
dependent on the physical characteristics of the majority of a
particular gemstone; such as Ruby being graded as a Type 2.. The charts
and the gemstones that fit into each are as follows:
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GIA
Type 1 Clarity Chart
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| VVS |
Very
Very Slightly Included - Minute to not detectable |
| VS |
Very
Slightly Included - minor |
| SI1 |
Slightly
Included - NOTICEABLE to obvious |
| SI2 |
Slightly
Included 2 - OBVIOUS to noticeable |
| I1 |
Included
1 - Prominent - moderate effect on appearance or durability |
| I2 |
Included
2 - Prominent - severe effect on appearance &
durability |
| I3 |
Included
3 - Prominent - severe effect on beauty, transparency
& durability |
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1 Gemstones are gemstones that are normally found to be
clean. This includes gems such as Amethyst, Aquamarine, Blue
Topaz, Citrine, Kunzite, Tanzanite, Yellow Beryl, Yellow Chrysoberyl,
Diamond. |
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GIA
Type 2 Clarity Chart
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| VVS |
Very
Very Slightly Included - Minor inclusions |
| VS |
Very
Slightly Included - NOTICEABLE to Obvious |
| SI1 |
Slightly
Included - Noticeable to OBVIOUS |
| SI2 |
Slightly
Included 2 - Obvious to Prominent |
| I1 |
Included
1 - Prominent - moderate effect on appearance or durability |
| I2 |
Included
2 - Prominent - severe effect on appearance &
durability |
| I3 |
Included
3 - Prominent - severe effect on beauty, transparency
& durability |
| Type
2 Colored Gemstones by their nature have natural inclusions. (Inclusions
are the norm) This includes gems such as Andalusite,
Crysoberyl, Alexandrite, Corundum (i.e. Sapphire and Ruby), Garnet,
Peridot, Quartz, Amethyst, Citrine, Ametrine, Spinel, Tourmaline,
Zircon. |
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GIA
Type 3 Clarity Chart
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| VVS |
Very
Very Slightly Included - NOTICEABLE to obvious |
| VS |
Very
Slightly Included - Noticeable to OBVIOUS |
| SI1 |
Slightly
Included - OBVIOUS to prominent |
| SI2 |
Slightly
Included 2 - Obvious to PROMINENT |
| I1 |
Included
1 - Prominent - considerable effect on appearance or
durability |
| I2 |
Included
2 - Prominent - severe effect on transparency or durability |
| I3 |
Included 3 - Prominent - severe
effect on beauty, transparency & durability |
| Declass |
Stones
not transparent because of inclusions |
| Type
3 Colored Gemstones by their nature have many natural inclusions. (Heavily
Included is the norm) This includes gems such as Emerald, red
Beryl, Rubellite Tourmaline. |
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Gemstone Enhancement Codes
| N
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F
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IR |
H
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O
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T
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D
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HL |
| None |
Filling,
Infilling or Stabilizing |
Irradiation |
Heat
Enhancement |
Oiling/Resin
Infusion |
Treated
(berylium) |
Dyed |
Heat
Enhancement/Lattice diffusion |
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Australian
owned with US and Canadian Representation.
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All
Gemstones are Inspected and Photographed by Cowdisley.
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Inspection
and Return Policy after Seven Days.
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Fluent
English Speaking and Writing Customer Support.
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Secure
On-line Payments.
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Fast
and Secure Shipping Options.
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Our
Business Operates With Complete Customer
Satisfaction As A Priority.
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Customer
Satisfaction: If
for any reason you are not completely satisfied with your purchase
please send us an email stating your concerns and we will address any
issue. Returns
are accepted for legitimate reasons within 7 days of delivery. Returns
must be approved via email and an RGA (Return of Goods Authorization)
code must be given prior to returning any item. Specific return
instructions will be provided along with RGA code.
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