Kutnohorite and Franklinite from Sterling Mine, USA

Kutnohorite and Franklinite from Sterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA

Nice little specimens of kutnohorite and franklinite from Sterling Mine, NJ, USA.

Brightly fluorescent under 255nm, but does not respond to 365nm, the more common wavelength. Under 255nm it is typically a neon red colour - sometimes with spots of neon green if another fluorescent mineral exists on the matrix.