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March 24, 2019, 01:40:10 am
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Some ID Help Please

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Author Topic: Some ID Help Please  (Read 245 times)
mrlnavy
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« on: January 31, 2016, 08:00:02 pm »

This is a great piece. When I bought the slab it was black, when I cut it I saw the pink. It turned out beautifully? What is it? Thanks


* 20160131_190205.jpg (843.89 KB, 2560x1536 - viewed 7 times.)
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Mike Longoria Sr

bobby1
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« Reply #1 on: January 31, 2016, 08:42:46 pm »

Rhodochrosite
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Ranger_Dave
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« Reply #2 on: January 31, 2016, 11:20:19 pm »

That black stuff is manganese oxide.
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Amethyst Rose
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« Reply #3 on: February 01, 2016, 08:11:49 am »

What happened is the rhodochrosite started to alter to manganese oxide just like silver tarnishing.  It started to react with something in the environment and turned black.  Rhodonite also does this a lot but as you saw the alteration did not go very deep and left the vast majority of the rhodochrosite untouched.

Nice cab

Bob Johannes
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mrlnavy
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« Reply #4 on: February 01, 2016, 06:49:47 pm »

Wow thank you Bob I appreciate it very much.
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Mike Longoria Sr


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