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Identity HelpLinarite Pseudomorph After Galena???

15th Nov 2014 18:46 UTCIan Whitlock

06308800016043236053896.jpg
I have a few specimens from The Blanchard Mine, and It appears that the Linarite is a Pseudomorph after Galena. Is that True? Or is it just Linarite w/ Galena in it?



15th Nov 2014 19:04 UTCUwe Kolitsch Manager

Linarite on a (apparently hollow) pseudomorph of (anglesite/cerussite?) after galena.

15th Nov 2014 19:47 UTCDoug Daniels

I don't think that's a hollow pseudo....the lighting isn't reflecting off the still-present galena. I've seen many of these. As for the genesis of the linarite, I don't know, it's been a long time since I've looked at them up-close. I do know there's much less copper (chalcopyrite) in the deposits as opposed to galena.

15th Nov 2014 19:59 UTCIan Whitlock

The Crystal isn't hollow. Its definitely solid all the way through. By the look of this piece, it appears that the crystal started off as Galena, then switched to Linarite, then Back to Galena, then Back to Linarite, Ect. Ect. Ect.


Or does the Linarite just grow over a Galena Crystal?

15th Nov 2014 22:55 UTCMark Heintzelman 🌟 Expert

All I see is galena coated by other minerals, linarite and probably anglesite (or perhaps just quartz). I see no "intergrowth" nor any sign of possible "pseudomorphosis" in this image. Blanchard galena is commonly altered, usually coated with a mm +/- thick layer of opaque white or crystalline anglesite.


Age old question I suppose, where do you draw the line between a mere coating of secondary or alteration mineralization and actual pseudomorphism.


MRH

15th Nov 2014 23:08 UTCRoger Curry

You're right Mark


Rog

15th Nov 2014 23:53 UTCIan Whitlock

Ok, thanks everyone
 
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