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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.
I noticed it is still valid at the N'Chwaning I Mine.
I think after olmiite was described, they all turned out to be olmiites?
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
Regarding Sturmanite, are not the bypyramidal, transparent, deep yellow-orange crystals always Sturmanite? I have never seen them described as anything else.
Hi Richard. you only know if you analyse the crystal, you can't "see" it

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