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Leadhillite

Posted by Matt King  
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Matt King April 12, 2010 07:17PM
Hi

Any ideas what this might be worth? Don't see too many specimens of Leadhillite online, so no idea where to start with possible valuation. Location is Susanna Mine, Leadhills, Scotland. Any help is much appreciated.

Thanks

Matt

BTW the specimen is about 10x5x4cm



Edited 1 time(s). Last edit at 04/12/2010 07:22PM by Matt King.
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Steve Rust April 12, 2010 07:40PM
If it is a Susanna Mine leadhillite then its a cracking specimen, and I could not afford it, some indecation of its worth !.

Steve Rust
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Ibrahim Jameel April 12, 2010 07:40PM
Probably quite a bit... how much exactly though, I do not know.
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Robert Meyer April 12, 2010 07:54PM
Matt,

What is the purpose of your question? Are you just curious? If this is a specimen in your possession, are your planning to sell it, and if so are you a mineral dealer with a cadre of well-heeled clients? The answers to these questions would affect how much it is worth to you.

Ultimately, how much something is worth depends on how much you or someone else could get someone to pay for it. The answer to that question depends on who you are.

I would say that this appears to be a very desirous, high powered specimen, worth thousands of dollars. Thanks for posting the photograph.

Bob Meyer
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Matt King April 12, 2010 08:19PM
Hi

This specimen is in my collection and I am not looking to sell it. I came across it by chance when I inherited a small collection and quite frankly I didn't ralise it was Leadhillite until I started matching up the labels with specimen numbers. I initally thought it was some form of calcite. But it would be good to get a ballpark, so at least I have some idea.
Thanks

Matt
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Rock Currier April 13, 2010 09:28AM
Mat,
Its so good for that locality I wonder if it is really a leadhillite. If it is, its worth several thousand dollars and possibly more than $10K. I am pretty sure that the British Museum does not have anything nearly as good. Its may be the best know example for the locality. Can you confirm that it is definitely leadhillite?

Rock Currier
Crystals not pistols.
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Steve Hardinger April 13, 2010 02:59PM
I agree with Rock on this one. It's a too-good-to-be-true case, until the identity has been confirmed by some sort of chemical analysis.
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Rob Woodside April 13, 2010 07:09PM
Apparantly I'm a closet trophy collector and if it is leadhillite, I'd be happy to have it, especially if there was some sussanite on it. Sadly Bob, Rock, and Steve are right. Now if only the stockmarket would cooperate I might be able to afford it.
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Steve Hardinger April 13, 2010 07:47PM
Rob, I didn't know they gave trophies for closets, and that people collected these trophies. Go figure.
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Robert Meyer April 14, 2010 08:00PM
Matt,
Yes, this piece definitely warrants an analysis, and you should look it over carefully with a microscope for associated mineral species. Pseudomorphs after Leadhillite also occur, so it could be an ex-Leadhillite. If it is Leadhillite, it is exceptional.
Bob
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Matt King April 14, 2010 09:34PM
Thanks for all your comments, much appreciated. I've done a simple hardeness test and it fits. I have also stuck the specimen under UV light and it fluoresces a dirty yellow, so that matches as well. But as you say it could be a pseudo. I've looked at it under a microscope but I can't see any other associated minerals like Susannite. Is anyone aware of a lab in the UK which could confirm the composition?
Cheers
Matt
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Stuart Mills April 14, 2010 10:29PM
Ask Mike Rumsey to look at it.
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Jolyon & Katya Ralph April 14, 2010 11:50PM
Yes. Talk to mike.
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Dana Slaughter April 23, 2010 07:43PM
Hi Matt,

Awesome rock if it is indeed a leadhillite! Send it my way--I'll deem it a simple calcite and give you $100 for it!! Just kidding of course, but I think Rock is absolutely correct. The size, aesthetics, crystallization and locality make this an especially desirable piece and I'm obliged to think that it could fetch far more than the 10K that Rock loosely set as a value. I'm crossing my fingers for you---it would be one helluva find if it proves to be leadhillite! Good luck! And thanks for the fine photo.

Best regards,
Dana
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Steve Rust April 27, 2010 07:43PM
Looking at the specimen again it dose look more like calcite, as Dana intermated. Its far to good a specimen of leadhillite from Leadhills.

Steve Rust
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Matt King May 04, 2010 11:12AM
Hi

Does anyone have the contact details for Mike Rumsey. I have tried via the NHM Mineralogy contact form but have not received any reply.

Thanks

Matt
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Jolyon & Katya Ralph May 04, 2010 11:19AM
He's been away, I believe he's back now so I'd wait and see if he contacts you.

Jolyon
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Knut Eldjarn May 04, 2010 09:13PM
Matt,
The Fl respons in SW is not conclusive, but leadhillite has a density of 6,5 (!) and calcite much less. You should be able to distinguish betweeen these by just holding the specimen - if leadhillite it should be very heavy !. Indeed if a Leadhills leadhillite - it is one of the best I have seen.
Knut
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