Dr. Beniamino Barbieri (of the Fluorescence Foundation) gave a lecture on the history of fluorescence, and published his slides here: https://www.fluorescence-foundation.org/lectures%5Cmadrid2010%5Clecture1.pdf. I reposted them here (w/ permission) where they can easily be found by our mineral folks (this was written mostly towards biologic fluorescence, but certainly applies to mineral fluorescence.
"On the Change of Refrangibility of Light" - G. G. Stokes (Stokes' Law) can be read here....