“Colorless, translucent harmotome crystals with scattered pyrite, on matrix. There is also (greyish) calcite present. 6.5 x 3.6 x 2.5 cm overall. This is an old specimen. Ex. Irenee du Pont Collection. Ex. University of Delaware Mineral Museum. Henry Minot photo & collection.”
Henry Minot - 8th November 2012