"A tan or light brown columnar mineral, with a somewhat divergent habit, was intimately associated with axinite, prehnite, and various other materials, in the remarkable cavity at the cut along Route 2 in Marlborough; although it has not been positively identified as yet, the author believes it to be zoisite." Schooner (1958. "optically confirmed" Schooner (1961)
tan or light brown
Quality of samples:
not specified / average specimens
Rarity at site:
Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).