A shockingly unusual example of this species of "rock forming mineral" - this is a tremolite crystal notable for sharpness and color; a semi-transparent, vitreous to silky luster. It is greenish, double-terminated floater crystal with well-defined faces and edges. From a recent find around 2018-2019. From Woodland Minerals (Watertown, New York) on January 30, 2020. Photo by Mark Mauthner.