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Author Topic: Very Rare Stone  (Read 1635 times)

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sjosephrw

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Very Rare Stone
« on: August 14, 2016, 12:54:08 AM »

I came across this very rare gem stone, just thought I might share the picture with you all, it 's a Corn Flower Blue Sapphire very large too 33 Cts.
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Enchantra

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Re: Very Rare Stone
« Reply #1 on: August 14, 2016, 10:09:00 AM »

I moved this here so your stone would have it's own topic and be seen.
It's a very beautiful faceted stone.   :icon_sunny:
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vitzitziltecpatl

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Re: Very Rare Stone
« Reply #2 on: August 14, 2016, 02:48:32 PM »

So where'd you come across it...? Your sock drawer?

No matter what, seeing a photo of a sapphire like that makes my day.

stoneya93

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Re: Very Rare Stone
« Reply #3 on: September 12, 2016, 08:37:19 PM »

That's an absolutely beautiful stone, thanks for sharing it with us  :glasses9:
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Windenzee

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Re: Very Rare Stone
« Reply #4 on: September 12, 2016, 10:54:56 PM »

That is a beautiful blue. You are very lucky to have come across it.
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rocks2dust

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Re: Very Rare Stone
« Reply #5 on: September 13, 2016, 10:04:27 AM »

That is huge, and a nice color. The photo isn't sharp enough to be certain, but there seem to be some growth lines (or could be fingerprints) visible through the lower facets if I enlarge the photo. Is it synthetic? Synthetics are much more common at that size (and have been for a century now). And even for mined stones, most of the better colors are now diffusion treated, so it is best to have them tested by a reputable lab (and there are some of no or little repute, as well as fake certificates) for synthetic and color treatment before buying or selling something this extraordinary. Some serious - Christie's or Sotheby's level - money for that if completely natural.

fossilman

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Re: Very Rare Stone
« Reply #6 on: January 25, 2017, 07:48:00 AM »

HOLY MOLLY,that is killer cool!!!! The blue just "POPS" out at a person!!
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Kosbare

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Re: Very Rare Stone
« Reply #7 on: February 04, 2017, 02:00:42 PM »

Beautiful! The blue color is amazing.

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crashoveroide

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Re: Very Rare Stone
« Reply #8 on: October 28, 2017, 10:39:35 PM »

Yes its color very Beautiful!..

 i will tell you aboth Cause of the Cornflower Blue Colour in Sapphire

Soft cornflower blue color is the specialty for which the famed Kashmir sapphires of the yore are known and a vivid pure blue color, highly saturated is displayed by them. The velvety look of the Kashmir Sapphires further distinguishes them.
This is the result of flour, the minute inclusions by which the light that travels the stone is softly diffused. The part of the charm of Kashmir sapphires is their velvety silky tone and is very distinctive as well.

Cornflower Blue Sapphire shades that are the most prized in the world are  the fabulous Kashmir Blue Sapphires that are rarely found today and command a hefty premium for Gem Quality specimens.

The velvety toned and richest cornflower blue is Kashmir blue sapphire. The cornflower blue color in these gems has a certain saturated, lazy quality. There is a wide range of colors in which the Kashmir sapphires are available from blackish gems, palest blues to the lushest Cornflower blues. However, best price is fetched by the standardized saturated cornflower blue color. For the purpose of bringing out the best color of these gems, most of them are cut as sugarloaf very carefully.

These days the basaltic lava rocks, river sands and the gravel found in the island of Sri Lanka produces a wider range of sapphire than any other classic source and is famous for its pure blue colour sapphires of a fine class.

Mining blue sapphires on the islands of Sri Lanka goes back to at least 2000 years.

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gemfeller

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Re: Very Rare Stone
« Reply #9 on: October 31, 2017, 01:19:10 PM »

crashoveroide, the problem is that this isn't a cornflower blue sapphire.  It's far too dark in tone and saturation to fit into that color description.  To quote the GIA on blue sapphire quality:

"Color has the most important influence on blue sapphire’s value. The most highly valued blue sapphires are velvety blue to violetish blue, in medium to medium dark tones. Preferred sapphires also have strong to vivid color saturation. The saturation should be as strong as possible without darkening the color and compromising brightness. Sapphires with these qualities command the highest prices per carat."

You're correct about the light-scattering effect of tiny inclusions in fine Kashmir sapphire.  But sapphire from that source hasn't been a factor in the market for over 100 years.  I strongly doubt the subject sapphire here is of Kashmir origin. 

The two most important sapphire sources today are probably Madagascar and Sri Lanka (Ceylon).  It's well known in the industry that much Mada sapphire is being cut in Sri Lanka and is often sold as Sri Lankan in origin.  New Sri Lankan gem discoveries are limited by that country's laws that require artisanal mining methods only.  The same laws don't apply in Mada and lots of new material is entering the market.

For those who are interested in such stuff, the properties of sapphire from those countries are nearly identical.  That's because they were formed in the same geological event.  Due to the effects of plate tectonics, Mada has drifted across the Indian Ocean to its present location near Africa while Sri Lanka remains near the Indian subcontinent.  Both countries are prolific producers of not just sapphire but many other fine gems like alexandrite, Tsavorite, other chrysoberyl varieties, tourmaline, garnet and many others.

Cornflower Blue Sapphire (GIA)
Cornflower Blue.jpg
*Cornflower Blue.jpg (48.81 kB . 636x358 - viewed 119 times)

Cornflower
Cornflower.jpg
*Cornflower.jpg (21.66 kB . 445x250 - viewed 116 times)
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