Fibrous Radiating Wollastonite - Maricopa County, Arizona
Contributed by: Chris Clemens
minID: NT4-F2P
Date: May 1st, 2026
Locality: Maricopa County, Arizona, USA (See on Mindat)
Size: 29 x 15 x 36 mm
Weight: 17 g
Description:
This is a small, but interesting specimen of fluorescent wollastonite from an uncommon location. Collected from an unknown mine in Maricopa County, Arizona, this specimen consists of white, radiating, fibrous/acicular crystals of wollastonite on an unidentified, tan-colored matrix. The wollastonite fluoresces cool white under SW UV.
Editor Comment (5-1-2026) :This is the only wollastonite specimen currently listed for Maricopa County in the mindat database. This specimen's radiating crystals, white color and blue/white SW fluorescence resembles tremolite from the Sunset South Mine that is in Maricopa County. The specimen may be tremolite and not wollastonite.
Originally posted by Chris Clemens on Nature's Rainbows in 2017.
Summary of luminescence responses:
Wollastonite (Mindat) (RRUFF)
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue