Turneaureite in Donpeacorite - Balmat, New York

Contributed by: Mark Cole
Date: Mar 27th, 2026
Locality: Empire State No. 4 Mine, Balmat, Fowler, St. Lawrence County, New York, USA (See on Mindat)

Description:
A member of the Apatite Group - arsenate analogue of Chlorapatite. There is a question whether the matrix truly contains donpeacorite, but since it is non-fluorescent, it does not matter.

Originally posted by Mark Cole on Nature's Rainbows in 2015.