Some new Minerals for Merelani and Tanzania

I just uploaded some new mineral pictures from a presentation given at the Rochester Symposium this past weekend. I thought I would post the mineral photos here in case anyone is interested. They are documented in the following reference, which has also been added to mindat's database: Simonoff J., Wise M (2012) A closer Look at Merelani Minerals. Mineral News Vol 28 No 2.












A picture of the molybdenites will be forthcoming.

Bob



Edited 1 time(s). Last edit at 07/21/2012 12:52AM by Jessica and Robert Simonoff.

Here are a coupe Merelani Stilbites I have owned. The first has larger (to 2.5 cm) Stilbites over a mostly now gone Tanzanite. The second is a 2.5cm Tanzanite with the backside coated by Stilbites (analyzed).

Thanks! We had seen this piece so knew someone thought stibnite stilbite was here, but saw no publication referencing an analysis that had been done. Thanks for the update.

Bob



Edited 1 time(s). Last edit at 07/21/2012 12:54AM by Jessica and Robert Simonoff.

Sorry not sure why it posted twice



Edited 1 time(s). Last edit at 04/24/2012 03:53AM by Jessica and Robert Simonoff.

Here are some more interesting things found

The blocky blue prehnites exhibit color change


The block blue pieces also fluoresce nicely.


And this piece hosted rhodochrosite (bright rhombs) and calcite (darker etched rhombs)


Also found was zircon


Finally, marcasite is newly reported from Merelani


Bob

Bob, great photos and specimens. Wow!

Thanks Jason, that is kind of you!

Bob

Good work Jessica, Bob and Mike!
and you meant Stilbite

Thanks Peter and you are correct of course. Typographical error.
Bob