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Post by Bob on Aug 20, 2020 11:19:42 GMT -5
I have from time to time purchased odd and ends at rocks shops and lost track of what I bought where. Last year in the tumbling contest we had rhodonite which about drove me crazy. I still have some pieces with fractures that are almost gone. Some of the pieces I got in the contest were almost half the pink rhodonite with less than half the black magnesium part.
Is there any other rock that looks almost exactly like the pink of rhodonite? I have found some pieces that have completed prepolish and they are totally pink. I don't remember any being like that, but I suppose it's possible on a piece or two that all the magnesium was ground away. I have looked at these pieces with a hand lens. They are just slightly pinker, and the pattern in them is swirly on some. I don't really see swirly patterns on the rhodonite. The surface shine after prepolish though is exactly the same as rhodonite, so unless someone has another theory, I'm going to presume they are rhodonite.
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Post by pauls on Aug 20, 2020 16:16:27 GMT -5
Yes probably Rhodonite, I have Rhodonite ranging from yellowish brown to brown to pinky brown, pink, dark pink and crimson all with varying amounts of black in them. Also varying degrees of graininess some are perfectly smooth and others are sugary and very difficult to get a good polish.
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Post by Bob on Sept 11, 2020 8:23:02 GMT -5
Thanks for helping me on that. Sure is weird how just one piece of rho with some magnesium oxide part can make the entire batch's water blackish.
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Post by pauls on Sept 11, 2020 17:11:38 GMT -5
I'm sure it's just a typo but its Manganese. Easily done, I have a thing where I need to actually stop and think before I type Fluorite otherwise I have flourite which I presume is some kind of bread. And yes I had to stop and think here as well.
If you leave a nice lump of Rhodonite out in the weather it pretty quickly turns completely black, sure makes it difficult to find a good piece in the bucket of black stuff in your yard.
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Post by Bob on Sept 11, 2020 19:18:15 GMT -5
Thanks very much for that. I get them mixed up all the time! Shouldn't though because I think I have a fire starter that is solid magnesium, a rather durable metal.
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