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PhotosEpididymite - Mount Malosa, Zomba District, Malawi
25th Feb 2012 02:05 UTCModris Baum 🌟 Expert
But I know that at Mt. Malso you can't tell epidymite from eudidymite without analysis.
Has this been analytically verified as epididymite? Seems surprising to me - but maybe my "rules of thumb" are wrong.
25th Feb 2012 03:26 UTCKelly Nash 🌟 Expert
But no, it hasn't been analyzed, by me anyway. Perhaps the fellow I bought it from did, but I think most of these from Mt. Malosa are just going on visual ID (see others).
25th Feb 2012 03:39 UTCModris Baum 🌟 Expert
Actually, I had two comments on two separate photos (one by someone else). The problem with "talk page" comments (which I realized after the fact) is that if you make comments on more than one photo from a locality is that both threads have the same header. But the links (still) go to different photos.
Modris
I just put numbers on the messages. Maybe that will help unconfuse things.
25th Feb 2012 15:50 UTCReiner Mielke Expert
25th Feb 2012 17:43 UTCModris Baum 🌟 Expert
As for Mt. Malosa, I'm just parroting what I've read.
But even albite (triclinic) can look orthorhombic at times - and so on and so on.
However, I'm probably the last person who should comment on morphology.
When I distinguish epidymite from eudidymite (or baryte from calcite etc., etc., ) I'm not thinking "this is orthorhombic", "that's monoclinic".
The fact of the matter is that most of the time I'm not sure. The minerals are almost always twinned and often occur together - sometimes epitactically, sometimes not.
I just "know" that one of thme grows like "this and this and this", whereas the other one grows like "that and that and that".
No doubt what I think I "know" is sometimes wrong. And often enough, I can't tell for sure even with what I "know".
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