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

PhotosHedyphane - Beltana Mine, Puttapa, Leigh Creek, North Flinders Ranges, Flinders Ranges, South Australia, Australia

30th Jan 2016 11:30 UTCMark Willoughby Expert

Mimetite

Mount Bonnie Mine, Grove Hill, Victoria-Daly Region, Northern Territory, Australia

Great little photo Gianfranco. I would love to see a chemical analysis on this one, it's extremely clear for the location. I know from the tests I've had done, there is quite a difference in the chemical make-up from specimen to specimen at the Beltana mine.

29th Feb 2016 22:16 UTCPeter Elliott

This does not look like it is from the Beltana Mine. There are other possible Australian localities. What is the orange mineral? What is the matrix?

23rd Sep 2016 00:52 UTCPeter Elliott

This is not hedyphane from the Beltana Mine. I don't think a 1.8 mm hedyphane crystal would be as transparent as these crystals. The orange mineral looks like goethite which does not occur with hedyphane at Beltana. The crystals look like mimetite from the Mt. Bonnie mine. These have been sold at mineral shows labelled as hedyphane from Beltana.

23rd Sep 2016 09:31 UTCUwe Kolitsch Manager

Thanks, Peter.

Message sent and comment added to Beltana page.

23rd Sep 2016 09:35 UTCUwe Kolitsch Manager

Peter: what do you think about the correct locality for these very similar crystals (both by Judy Rowe)?

http://www.mindat.org/photo-319232.html (from "Mt. Bonnie")

http://www.mindat.org/photo-391429.html (from "Beltana")

23rd Sep 2016 11:38 UTCReiner Mielke Expert

Uwe the two photos you linked to sure look like they are the same, even the matrix looks the same.

23rd Sep 2016 12:57 UTCGianfranco Ciccolini 🌟

Hello to all

I have received the specimen by Robert Sielecki, in Sydney, in 1982, as Hedyphane and from Puttapa. The crystal depicted in the photo is as unique as the beauty and size, than they are in the crystalline matrix. So it is written on Catalogue of South Australian minerals: "Individual crystals reach 2 mm in size ..", on page 102. In this page is also depicted an identifying design of Hedyphane crystallization from this locality. Characteristic of this crystalline form is the absence of the prism. I have also another specimen, with Hedyphane, as smaller crystals and less yellowish, with green Finnemanite, similar to this posted. And I also mimetite from Mt Bonnie mines, associated with duftite and is different, as it's more yellow, yellow-green about the color, with small prism faces. I know, however, that the absence of the prism can be indicative but not exhaustive. See also MR 15, page 110.

I am available to you and when you decide, I will do it.

25th Sep 2016 03:22 UTCRalph S Bottrill 🌟 Manager

These certainly look more like Mt Bonnie mimetite, though its rarely so colourless and transparent either. We should check with Rob. Sadly we can no longer check with Judy!

Gianfranco, the finnemannite is very rare, it would be great to have a photo and any analytical confirmation please?

25th Sep 2016 08:00 UTCGianfranco Ciccolini 🌟

Hi Ralph

The specimen with finnemanite I received from Mr. Renato Pagano, who forwarded your request. It will not be easy for me to be able to photograph the finnemanite, because it is in small crystals. It will be my future photographic objective. But it will take a bit 'of time before I have to adjust my back.:-(

Regards

Gianfranco

25th Sep 2016 13:44 UTCRalph S Bottrill 🌟 Manager

Thanks Gianfranco!

26th Sep 2016 03:59 UTCPeter Elliott

Gianfranco

I have colourless to pale grey mimetite crystals from Mt. Bonnie identical to those in the photograph. As I mentioned, these have been sold by dealers as hedyphane.

What is the matrix of the specimen?

26th Sep 2016 13:37 UTCReiner Mielke Expert

Why not get it analyzed? Would not have to be that crystal, but a small piece of a crystal on the same specimen (assuming you would not find the two species together on the same specimen). A semiquantitative EDS analysis for $10 would be good enough to distinguish the two.

28th Sep 2016 06:51 UTCPeter Elliott

There should be no need to analyse the crystals. Specimens from these two localities are easily distinguished. No one with a good knowledge of Australian localities would mistake them. A photograph of the complete specimen would help.

White/grey hedyphane from Puttapa is opaque an shows no transparency at all, unless very tiny crystals of less than 0.5mm or so. The matrix will be 100% white or red willemite or at least contain some willemite. Any associated orange mineral will be smithsonite or rhodochrosite, never goethite.

Green crystals associated with hedyphane from Puttapa are most likely austinite, not finnemanite. As far as I can tell, finnemanite has never been positively identified from Puttapa. It was mentioned in a 1971 paper on the deposit. Many of the minerals mentioned in this paper are certainly wrongly identified and others are very doubtful. Green "finnemanite" from Puttapa has been sold by some mineral dealers and can still be found listed on dealers websites. These are almost certainly austinite.

Most mimetite from Mt. Bonnie is on a goethite matrix. These crystals are yellow, greenish, brown, grey, white. Some, including the tabular crystals that show no prism faces like those in the photograph, are on a mostly massive mimetite matrix and are associated with goethite.

28th Sep 2016 09:09 UTCGianfranco Ciccolini 🌟

Thanks Peter!

a) From Mount Bonnie mine I have this specimen of mimetite, with around green crystals, lighter in the middle part, classified as duftite, though they remember me adamite crystals, but it is not present in that mine. The mimetite lemon yellow, consists of broad-based, with faces of bipyramid and the matrix is very different from that of the supposed ediphane: http://www.mindat.org/photo-775305.html and http://www.mindat.org/photo-775306.html.

b) The specimen from Puttapa, with the supposed finnemanite, is with fluorescent willemite (not ediphane as I mistakenly wrote, trusting my memory), I received it from Dott. Renato Pagano, who in turn got it from an Australian businessman. He will analyze it. But the Austinite has a unique crystal clear and easily identifiable dress and very different from that of finnemanite.

c) I have another specimen from Puttapa, not photographed, with the ediphane, and it corresponds exactly with the description of Peter: crystals, the same as morofologia all these, white, non-transparent, with willemite radiused.

d) We come to this supposed ediphane. I have two specimens of it, the same as matrix. The crystals in the second specimen, not photographed, are whiter and less transparent and more subtle, with the growth lines on bipyramid faces. The matrix is very different from all the other samples, because formed exclusively by these crystals. And this show you a picture, below. Sincerely, especially if the ediphane shows exclusively in the form b), then I agree that we are in the presence of mimetite. However, here are http://www.mindat.org/gallery.php?loc=157429&min=1844 specimen is not all with the same characteristics, but rather with those that look at my specimen: http:// www.mindat.org/photo-200720.html, http://www.mindat.org/photo-391429.html.

I hope you manage to understand my message, obtained through Google translator. And I'm at your disposal for further clarifications.

28th Sep 2016 09:41 UTCUwe Kolitsch Manager

Both www.mindat.org/photo-727978.html and

Judy Rowe's photo http://www.mindat.org/photo-391429.html changed to mimetite and Mt. Bonnie.

8th Feb 2017 19:33 UTCStephan Wolfsried Expert

The photo is still in the head bar of Hedyphane, which is definitely wrong.

Stephan

9th Feb 2017 11:49 UTCUwe Kolitsch Manager

Thanks, fixed (it was an override photo).

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 10, 2024 16:52:26

Go to top of page