Axinite-(Mn) and Willemite - Franklin, New Jersey
Contributed by: Mark Cole
Date: May 18th, 2026
Locality: Franklin Mine, Franklin, Sussex County, New Jersey, USA (See on Mindat)
Description:
We have a bunch of folks attending the Franklin "Super Digg" this April (2017). Many of them are carrying the new Convoy 365nm LW flashlight so I thought it would be nice to give folks an idea of what many of the minerals they hope to find would look like under the Convoy. This light is very powerful and puts out a pinpoint beam which causes fluorescence in minerals not thought to really be LW fluorescent. In some cases, you must hold the light right up against the rock but it gives a great hint about what it is and what it might look like under shortwave.
This is a piece of axinite-(Mn) (aka manganaxinite) and willemite. The first picture is SW while the 2nd picture is LW 365nm Convoy. The axinite-(Mn) is nicely fluorescent under both - the Convoy light and of course SW.
Originally posted by Mark Cole on Nature's Rainbows in 2017.
Summary of luminescence responses:
Axinite-(Mn) (Mindat) (RRUFF)
- Fluorescence under Longwave (365nm LED) UV light: Red
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green