Tremolite and Anthophyllite, Balmat, New York

Contributed by: Chris Clemens
minID: NGG-WL3
Date: Apr 24th, 2026
Locality: Balmat, Fowler, St. Lawrence County, New York, USA (See on Mindat)
Size: 41 x 25 x 66 mm
Weight: 84 g

Description:
Foliated layers of needle-like crystals of light pink tremolite and intergrown anthophyllite, from Balmat, St. Lawrence County, New York. This specimen is brightly fluorescent under UV. When viewed under shortwave, the tremolite shows a bright orange response and the anthophyllite fluoresces a magenta/purple color. Longwave produces a more pastel response with subtle pink and peach tones. There is also minor talc present that fluoresces blue/white.

Originally posted by Chris Clemens on Nature's Rainbows in 2016.