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Post by bobby1 on Feb 4, 2013 22:15:28 GMT -8
.... summer before last at the CFMS show. The dealer said it was all Rhodochrosite but I wasn't sure that he was correct. The brown stuff just didn't look anything like Rhodochrosite. Bob Jones (of rock and gem fame) was at the show at the magazine's booth that weekend. I was chatting with him about various things and it crossed my mind to get his opinion on the slab. He said the brown stuff was Siderite that had infilled amongst the Rhodochrosite. What do you think of the slab? I found it very interesting and definitely unique, though not unique enough to inspire me to buy it. Bob  |
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Post by Kris Rowe on Feb 7, 2013 13:38:34 GMT -8
That's a really different and very likely unique slab, Bob. I've never seen a brecciated rhodochrosite/siderite slab! thanks for the peek and story.  Kris |
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Post by Denise Hansen on Feb 10, 2013 12:35:38 GMT -8
Rhodochrosite derives its pink color from manganese. Siderite is a brownish color with much the same properties as rhodochrosite. It is not that uncommon to find the two together, but it is the distinct breciation of this piece that makes it so dramatically unique! In the US... Mississippi, Colorado and N Carolina are areas of occurrence for these two minerals but who is to say that this may have originated from Romania, Argentina or another overseas location.
Thanks for sharing this... it is truly unique!
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Post by paulshiroma on Feb 18, 2013 17:55:20 GMT -8
Very slick piece, Bobby. Thanks for posting the photo.
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