Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery
Chester S. Lemanski, Jr. November 27, 2011 10:55PM

No problem. Post whenever. We collected malachite there back inn the early 90's. It was altering out of primary sulfides in a veinlet in the marble.
Harold Moritz (2) November 28, 2011 12:50AM
Cool, yeah, I've seen it there for years, just finally found a little piece worth paying the fee for (actually it was so small it didnt register...) :)
Harold Moritz (2) May 05, 2012 04:16PM
Here is a specimen (3554) I picked up at the SHMM garage sale last Saturday. It is pyrite, chalcopyrite and magnetite (very magnetic and black streak) in calcite. The label just says Sterling Hill, but when I checked out at the register, an elderly fellow on the staff mentioned he remembered collecting it and kinda gestured out toward the south. With all that was going on a failed to ask specifically where it came from, but seemed it might have been a boulder in the Passaic Pit. So, wondering if anyone remembers so it can be properly attributed before posting to the gallery.

Also attached is a specimen (3553) I picked up the same place that didnt have a label but I recognized its Passaic Pit origin because I bought another just like it that did have a label. On both specimen the mineral forms small spherical rosettes or radiating aggregates of tiny platy crystals, with bright broken surfaces and seems to match very well Dunn's description of chalcophanite. However, the labeled specimen says it is hetaerolite. I dont have a lot of experience with these older Mn oxides so would appreciate input on the species before posting. I will take a microphoto of the aggregates soon.
open | download - 3554ast resized.jpg (329.6 KB)
open | download - 3554bst resized.jpg (400.2 KB)
open | download - 3553ast resized.jpg (330.3 KB)
Harold Moritz (2) May 05, 2012 08:26PM
Here are the microphotos. Tough to do, combination of black with specular reflections makes them come out a bit garish. Anyway, the FOV of 3553bst is 5.5mm and the FOV of 3553cst is 2.39mm. The overall bluishness fits the description of chalcophanite as well.
open | download - 3553bst resized.jpg (504.6 KB)
open | download - 3553cst resized.jpg (323.3 KB)
Steven Kuitems May 06, 2012 02:02AM
Harold, the pic's are indeed chalcophanite crystal clusters. Nice photos.
Sorry, only registered users may post in this forum.

Click here to login

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2017, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: May 25, 2017 13:30:56
Go to top of page