|Norbergite is a member of the humite group.
It occurs in metamorphosed limestone (marble) as pale yellow grains. Some
norbergite is fluorescent, but some is not.
This specimen came from the old Farber Quarry (Franklin Quarry) on Cork Hill Road between Franklin and Ogdensburg, NJ. As far as I know, this locality is closed now. The specimen came from one of the field trips that FOMS used to host at the quarry.
This is the highest-grade brightness of fluorescent norbergite that occurred at the Farber Quarry. It is bright enough that it can sit right next to willemite and not be drowned out by willemite's intense FL response.
Specimen is about 3 inches across.