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GeneralHelp with Location.

1st Oct 2014 12:12 UTCPeter Trebilcock Expert

I am looking for help for a possible area/ location for this specimen , it was part of an old collection that was put together pre 1922, it does have the collection number of 115 but unfortunately this is unreadable on the faded inventory, many of the other specimens were labelled and itemised and came from the USA from areas such as Keweenaw .

It is on a layered Gozzan matrix and the Malachite has a velvety sheen on the small parts I have cleaned , this is the second area I would like advice , is there a safe way to clean Azurite? or just leave as it is.

Peter Trebilcock.

1st Oct 2014 13:37 UTCPaul Brandes 🌟 Manager

Definitely not from the Keweenaw.

Looks more like a SW United States/Mexico specimen, but as far as an exact location............ :-S

1st Oct 2014 16:17 UTCPeter Trebilcock Expert

Hi Paul , thank you for your input, I am wise enough to realise it will never get tied down to a specific mine or indeed a state, my first thoughts were possibly the USA simply because the old collection came from three specific areas that are ,the Cumberland ore field, USA and of course Cornwall which is my area of collecting.

It will have to stay labelled as a "Pretty" only .

Regards Peter.

1st Oct 2014 18:21 UTCRolf Luetcke Expert

Looks like Arizona but as for exact mine, hard to say. Cold be Morenci but with the time it came out could be lots of places.

Mostly wanted to add that sonic cleaning is fine for these kinds of specimens. No brushing because it ruins the Malachite. Sonic cleaning with a bit of liquid dish soap and then rinsing afterwards is best.

The big Bisbee collector used to take his specimens, not the really delicate ones but the Azurites and such to the car wash.

I would stick to sonic cleaning, should do a good job.

Rolf

1st Oct 2014 18:47 UTCVitya

I don't believe this is a Michigan or a Keweenaw Peninsula specimen. I have seen similar specimens from the various copper mines in Arizona and that is where I am more likely to believe it came from. Trying to narrow down the locality in Arizona would be more difficult as from what I have seen some mines produce similar looking specimens.

I personally enjoy collecting Arizona specimens and that is a nice specimen you have shown there. I really like the Azurite ball's that are visible on the Malachite and matrix. If I am not mistaken the Malachite appears to be fibrous in certain areas of the sample. Could you please specify what the size of the specimen is.

1st Oct 2014 19:06 UTCeugene reynolds

hi yaaaa peter,,,cant verify,,but the spec.looks a lot like the material i was able to collect years ago from the new cornelia mn.,pit,in ajo az.

or maby one of the mines in the bisbee area,i have some nice micros from the lavender pit area, have seen a lot of this spec at the give away tables at the tucson show micro meetings but no dates of when collected,, time would fit nicely gene reynolds

1st Oct 2014 19:40 UTCPeter Trebilcock Expert

Hi Vitya ,Eugene, its really good to get such quick and informative feedback, your suggestions fit nicely with those made by some of our local collectors over here but again it will still have to be labelled only as a possible location and have the old question mark .

Sorry that I forgot to add a size ,did not seem important at the time but its quite a big lump, approximately 190mm or 8" long,125mm or 6" wide and about 2" or 50mm at its highest . It does have areas of fibrous and what I can only describe as "silky " areas of Malachite if this helps.

Regards Peter Trebilcock. Cornwall.

1st Oct 2014 19:48 UTCPeter Trebilcock Expert

Hi Rolf, thanks for the tips.

Regards Peter

1st Oct 2014 20:15 UTCDave Owen

I tgink the red matrix is somewhat indicative of Morenci.

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