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Identity Helpminor minerals with Bournonite, Huaron Mine, Pasco, Peru

9th Sep 2015 21:56 UTCDennis McCoy

04278960016029373823381.jpg
I just acquired this Pyrite with Bournonite as part of a mineral purchase. There are several minor minerals associated. The label identifies calcite, which is present as very small scalenohedron. I have found tiny quartz and some misshapen crystals that may be sphalerite or impacted bournonite. the one that I am wondering most about are these bladed crystals. None of the minerals listed fro the Huaron mine show this crystal form. (I wondered about dolomite, barite and covelite, but barites from this mine look different, dolomite is generally saddle shaped and covelite is the wrong color.) I also considered clear rhodochrosite, but the form is wrong.

06504420015702833386738.jpg

07841880015702833389202.jpg

9th Sep 2015 22:01 UTCDennis McCoy

05722240016029373821061.jpg
here is one of the small Bournonite "cogwheels".



many of the bladed crystals are partially or fully included with Bournonite or sphalerite.
09534820015702833384649.jpg



and here with arsenopyrite?
00522370015702833391761.jpg

9th Sep 2015 22:44 UTCMichael Wood

The bladed crystals look like calcite to me, I'm sure I've seen this crystal habit before.

9th Sep 2015 23:52 UTCMichael C. Michayluk

I agree with Michael, the white/clear blades are almost certainly Calcite, kinda similar to this calcite http://www.mindat.org/photo-674939.html

10th Sep 2015 00:44 UTCJolyon Ralph Founder

Agreed, calcite

10th Sep 2015 18:23 UTCDennis McCoy

Thanks All. The label said calcite, but I wasn't familiar with that crystal form.
 
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