Tourmaline with Uralite The Historic Hilltop Site, Powers Farm, Pierrepont, St. Lawrence County, New York. Collected by Michael Walter, August 21, 2013. These tourmalines have been tested and shown to be dravite on their outsides and to have cores of fluoruvite (reference Chamberlain, S.C., Robinson, G. W., Walter, M. R., Chiarenzelli, J. R., Lupulescu, M. V. and Bailey, D. G. 2016.  Collector's guide to the tourmaline of Pierrepont, New York. Schiffer Publishing, Ltd., Atglen, PA.  p. 114-117).  This piece is a 6.2 x 6 x 2.4 cm plate with damage-free crystals of tourmalines to 2.5 cm each. Largest crystals have some damage as seen. The uralite is also damage-free and is a talc/tremolite pseudomorphs after diopside.  It is not common to find these in combination with the tourmalines but when they are they provide a nice contrast in luster and crystal forms between the two minerals.    $120