Prehnite, Laumontite

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An EXCELLENT specimen from a very UNCOMMON Minnesota locality of sparkly off-white to light rust-brown, columnar prehnite pseudomorphing laumontite on matrix from the Knife River. A very small find of these came out several years ago and this is the BEST and LARGEST of the two specimens that we obtained. A couple of broken crystals certainly do not impair this piece in any way. 6.4 x 5.7 x 5.3 cm