Learning Center What is a mineral?The most common minerals on earth Information for Educators Mindat Articles The Elements The Rock H. Currier Digital Library Geologic Time

Minerals by Properties Minerals by Chemistry Advanced Locality Search Random Mineral Random Locality Search by minID Localities Near Me Search Articles Search Glossary More Search Options

The Mindat Manual Add a New Photo Rate Photos Locality Edit Report Coordinate Completion Report Add Glossary Item

Mining Companies Statistics Users Mineral Museums Clubs & Organizations Mineral Shows & Events The Mindat Directory Device Settings The Mineral Quiz

Photo Search Photo Galleries Search by Color New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery Photography

Discussions

💬 Home 🔎 Search 📅 Latest

╳Discussions

💬 Home 🔎 Search 📅 Latest

Groups

Recent Images in Discussions

Identity HelpLengenbach Quarry

23rd May 2014 17:15 UTCBeppe Finello Expert

Can anyone help me to identify these two Lengenbach Quarry specimens?

Thank you.

23rd May 2014 19:33 UTCSteve Hardinger 🌟 Expert

Did you start with the Lengenbach Quarry book? It is an excellent source for this sort of thing.

23rd May 2014 20:58 UTCBeppe Finello Expert

Hi Steve, i bought a lot of time ago, I think in 1994, "Mineralogie der grube Lengenbach" by Beda Hofmann, Stefan Greaser, Toni Imhof, etc. in the little minerals shop of Imfeld; it is an old work but always very good, but i think that only a very expert of mineralogy of certain places can surely identify a specimen through a photo.

I hope that someone of these expert will help me.

I have a good number of specimen classified visually as sartorite, dufrenoisite, baumhauerite, etc. but absolutely I am non sure of that; If you are non an expert of that place the Lengenbach minerals generally are very hard to identify, because many species are similar.

23rd May 2014 22:45 UTCKeith Wood

#1 Rutile, nice sixling twinning going on there.

#2 Pyrite, with iridescent coating and striations.

24th May 2014 06:00 UTCStephan Wolfsried Expert

Rutile and Pyrite definitely not.

The First One can be Lengenbachite on another Sulfosalt.

The Second One Baumhauerite maybe. Hard to say without analysis.

Stephan

24th May 2014 07:50 UTCAntonio Borrelli Expert

I agree with Stephan.

24th May 2014 09:17 UTCGreg Dainty

No idea what they are, but great photos Beppe.

24th May 2014 11:20 UTCUwe Kolitsch Manager

1. Twinned lengenbachite or jordanite, on a prismatic sulphosalt.

2. Impossible to say without analysis.

24th May 2014 12:01 UTCDavid Hospital

I agree with Stephan and Uwe,

1. Lengenbachite

2. Probably sartorite or baumhauerite, but needs analysis.

David Hospital

24th May 2014 16:56 UTCRob Woodside 🌟 Manager

I think Stephan, Uwe and David have done the best that can be done with photos. These are very difficult to sort without analysis.

24th May 2014 21:03 UTCBeppe Finello Expert

Thanks to everyone for your contribution.

may be enough a Micro Raman for understand what sulphosalts are?

With the EDS that we have in Turin the samples would be destroyed and I mind a little.

24th May 2014 22:19 UTCRob Woodside 🌟 Manager

Conductors give messy "Raman" spectra which are often not really diagnostic. There is also the problem of reference spectra for such rare minerals. RRUFF has no lengenbachite. But Raman is non destructive and it would be good to know what the spectra of these minerals are.

25th May 2014 00:01 UTCKeith Wood

I'll be glad to be wrong - those are much more interesting minerals than my guesses.

Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 4, 2024 22:10:06

Go to top of page