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I collected this crystal at Mt. Malosa, Malawi, hardness 3.0 and does not react with acid, what is it?

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asked Jul 31, 2015 by danasaur (120 points)

1 Answer

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Arfvedsonite and aegirine crystals are found on Mt. Malosa, malawi. Can't answer specifically on your specimen, but it may be a pegmatite of some sort.
answered Aug 2, 2015 by Weasel (58,940 points)
I collected several different minerals, including those mentioned. The problem is that there is nothing definitive in the literature about this piece. Yes, there are a variety of pegmatites, but nothing like this. Any other ideas would be welcomed.
The crystal shape would very much indicate quartz. Can you please post some additional photos?
Cannot be Quartz, has 3.0 hardness. Will add more photos.
That would be very odd indeed since it looks so much like quartz. How did you ascertain it's hardness as being 3?
I tested it using my "MINERAL IDENTIFICATION KIT" which includes 8 Hardness Picks to scratch test from Mohs 2 thru 9.  I have tested it several times in different locations on the piece.  I thought it may have been due to an outer coating of something, but it was not.  Believe me, it has me stumped!
In that case are you able to post some additional pictures?