Powellite on Calcite, Sterling Mine, Sterling Hill, Ogdensburg, New Jersey

Contributed by: FMS Admin
Date: Mar 9th, 2026
Locality: Sterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA (See on Mindat)
Size: 6 x 4.5 x 7 cm

Description:
Gravity tram, 20 ft below 180 level at 1040 N, 1270 W, Sterling Mine, Ogdensburg, New Jersey. (Per R. Bostwick: That particular find of powellite comes from the gravity tram, 20&apops; below the 180 level, mine coordinates 1270W, 1040N) A large grain of dark brown, glassy powellite in a matrix of coarse-grained, red fluorescent calcite and green amphibole. This powellite grain, 2 cm across, is unusually large; most are the size of a pea or smaller.

Originally posted by Earl Verbeek on Nature's Rainbows.

Fluorescence under shortwave UV light.

Normal light.

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Yellow