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Mike Salotti March 20, 2012 11:34PM
I have a Bultfonteinite and Poldervaartite specimen labeled from this mine. Does anyone know why Poldervaartite is no longer a recognized mineral at this site? Thanks.
Mike Salotti March 20, 2012 11:38PM
I noticed it is still valid at the N'Chwaning I Mine.
Alfredo Petrov March 21, 2012 12:47AM
I think after olmiite was described, they all turned out to be olmiites?
Rolf Brandt March 21, 2012 06:19AM
Alfredo is right, after they discovered that some poldervaartite was wrongly identified as such, it is thought that most poldervaartites are actually olmiites. Problably similar to the sturmanite/ettringite problem, you have to analyse them to know what is what. Rolf
Richard Gunter March 21, 2012 05:06PM
Regarding Sturmanite, are not the bypyramidal, transparent, deep yellow-orange crystals always Sturmanite? I have never seen them described as anything else.
Rolf Brandt March 21, 2012 08:15PM
Hi Richard. you only know if you analyse the crystal, you can't "see" it
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