[ExI] tumbling pyramids again

[Mike Dougherty]

On Feb 19, 2017 7:06 PM, "spike" <spike66 at att.net> wrote:

In principle I agree, but that you found a piece of halite outdoors I
consider unlikely.  Many crystals form a face-centered cubic structure, but
halite will be unlikely to stay long outdoors (too water soluble.)

I was at a school.  No doubt this chunk of salt came off a truck.  It's
been cold enough to worry about salting roads,  then warm enough to want to
go for a walk.
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