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Alexandrite

Tsarstone collectors guide

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QUOTE (in "Large clean chrysoberyls sells for around USD 200.00 per carat" by Marisa Spano on Apr 11 2009, 12:49 PM)
Micheal,

It does look like a chrysoberyl. And it's really big. You need to get a strong fiber optic light and shine it through the stone to see if it's clean or if it changes color.

It doesn't look clean from the picture but some parts of it could be clean. Large clean chrysoberyls sells for around USD 200.00 per carat. (25cts.+) If not clean, they have to be very inexpensive like USD 10.00 per carat.

If it shows a decent color change, then you can cut some alexandrites and those don't need to be clean but the color of that rough doesn't look like it's alexandrite.

What kind of light did you shoot with?
Micheal,

It does look like a chrysoberyl. And it's really big. You need to get a strong fiber optic light and shine it through the stone to see if it's clean or if it changes color.

It doesn't look clean from the picture but some parts of it could be clean. Large clean chrysoberyls sells for around USD 200.00 per carat. (25cts.+) If not clean, they have to be very inexpensive like USD 10.00 per carat.

If it shows a decent color change, then you can cut some alexandrites and those don't need to be clean but the color of that rough doesn't look like it's alexandrite.

What kind of light did you shoot with?
An alexandrite piece of ore (chrysoberyl rough) weighing over 2984.9 ct (597 gr) was found at the Malyshevskoye deposit's (Russia) in 2000, was valued at 175.000 USD as an opening bid, but nobody wanted to buy it. Russian owners named it "Patriot" - a common practice for unique specimens.

After gemmologists from GOKHRAN - the official Russian depository for precious metals and gemstones, examined the specimen, the name "Patriot" was revoked and the specimen down valued to 15.000 USD.

But as David pointed out, such large pieces of rough could have value even if it doesn't have gemmy parts, as a unique specimen for the museum or private collection.
That seems to be very large for a chrysoberyl of any kind but we did have some large chrysoberyls in the past.

b_chrysoberyl.jpg

The value will depend on the clarity of the rough and the degree of color change and if it is indeed facetable in part. Otherwise, the rough could also have some value as a specimen especially if it is well formed and undamaged.

Attachment (s)

I am new in this game but I have a 3,800 carat chrysoberyl. I bought it in Africa and the assay said they think it's an alexandrite but the organic compound is still on it so they don't know for sure yet. It is a very dark green on the outside. Can anyone tell me what this stone might be worth.I sure went through a hell of a time to secure this stone. Thank you for any input.

Picture 002.jpg

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Topic page 1 of 1
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Bibliographic details
Page title A very large Alexandrite
Author Micheal Henstra
Website title Alexandrite Tsarstone Collectors Guide
Date published 03 April 2009 17:32 UTC
Date accessed 31 October 2014 22:10 UTC
Permanent link http://www.alexandrite.net/viewpage.html?id=FRM-340
AMA style
Micheal Henstra. "A very large Alexandrite". In Alexandrite Tsarstone Collectors Guide. April 03, 2009, 17:32 UTC. Available at: http://www.alexandrite.net/viewpage.html?id=FRM-340. Accessed October 31, 2014.
APA style
"A very large Alexandrite". (2009, April 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 22:10, October 31, 2014, from http://www.alexandrite.net/viewpage.html?id=FRM-340.
Bluebook style
"A very large Alexandrite", http://www.alexandrite.net/viewpage.html?id=FRM-340 (last visited October 31, 2014).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "A very large Alexandrite", http://www.alexandrite.net/viewpage.html?id=FRM-340 (Huge 3,800 carat chrysoberyl rough) (as of Oct. 31, 2014, 22:10 GMT).
CBE/CSE style
Micheal Henstra. "A very large Alexandrite". In Alexandrite Tsarstone Collectors Guide. 2009 Apr 03, 17:32 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2009 Apr 03, 17:32 UTC [cited 2014 Oct 31]. Available from: http://www.alexandrite.net/viewpage.html?id=FRM-340.
Chicago style
Micheal Henstra, "A very large Alexandrite", http://www.alexandrite.net/viewpage.html?id=FRM-340, (accessed October 31, 2014).
MLA style
"A very large Alexandrite". Alexandrite Tsarstone Collectors Guide. 03 Apr 2009, 17:32 UTC. 31 Oct 2014 http://www.alexandrite.net/viewpage.html?id=FRM-340
MHRA style
Micheal Henstra, "A very large Alexandrite", Alexandrite Tsarstone Collectors Guide, 03 April 2009, 17:32 UTC, http://www.alexandrite.net/viewpage.html?id=FRM-340 [accessed 31 October 2014].
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