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Is this Kernite?

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alt textfound a lot of this in a cabinet and have no idea where it came from. Most is in a big glob, but some of the pieces broke off, The big piece is about the size of a human hand. Lots of white splintery pieces came of when handled. Is this Kernite? or is it something else? Thanks in advance for your help

asked Mar 5, 2014 by rosiefraz (1,560 points)

5 Answers

0 votes

Hard to tell by just visual identification. Give it a lick - if it has an astringent taste its kernite. Also kernite will develop a powder on its surface in humidity. Its more likely to be gypsum - see if you can stick your fingernail in it slightly, which means it is sectile and most certainly gypsum.

answered Mar 5, 2014 by hershel (47,740 points)
0 votes

no real taste. cannot put my fingernail in one of the pieces pictured but can in a bigger piece that has lots of "blades" and it broke one off.

answered Mar 5, 2014 by rosiefraz (1,560 points)
0 votes

To me it looks like selenite.
I can't see if the flakes are transparant.

answered Mar 19, 2014 by Renata (7,840 points)
0 votes

Agreed - its most likely selenite, since you were able to put your fingernail in a larger piece. Thats a unique form of sectility that gypsum has which makes it easily identifiable.

answered Mar 20, 2014 by hershel (47,740 points)
0 votes

Thank you.

answered Mar 26, 2014 by rosiefraz (1,560 points)

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