[Rockhounds] Unknown mineral

[Jim Daly]

I agree with Earl- looks like it could be from Mapimi, and it's an inclusion, most likely in calcite- acid would tell. The color, though, suggests malachite rather than aurichalcite.
Jim

--- On Tue, 8/12/08, Earl R. Verbeek <everbeek at ptd.net> wrote:

From: Earl R. Verbeek <everbeek at ptd.net>
Subject: RE: [Rockhounds] Unknown mineral
To: "'Rockhounds at drizzle.com: A mailing list for rock and gem collectors'" <rockhounds at lists.drizzle.com>
Date: Tuesday, August 12, 2008, 11:58 AM

As I so often said during the 60s, I think you should drop some acid.
That'll confirm or rule out calcite.  Perhaps is aurichalcite included
in calcite or aragonite?  I've seen aurichalcite intergrown with
hemimorphite (another possibility) from Mapimi.
 
             Cheers-    Earl
 
----------------------------------------------------
Dr. Earl R. Verbeek
Resident Geologist
Sterling Hill Mining Museum
P:  973-209-7212
F:  973-209-8505
E:  shmm at ptd.net
 
 
-----Original Message-----
From: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com] On Behalf Of Lawrence Rush
Sent: Tuesday, August 12, 2008 2:49 PM
To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
Subject: [Rockhounds] Unknown mineral
 
I need some help with an unknown. It can be seen at:
 
http://www.connroxminerals.com/bone.html
 
This is one of the specimens I recently got where the boxes and labels
had 
been destroyed...
 
Any ideas?
 
Larry
 
 


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