Stevensite is not a particularly common, or known, fluorescent mineral. To be honest, its fluorescence is also not that impressive: a whiteish/yellow, best under longwave. Manuel Robbins in his book “Fluorescence. Gems and Minerals under Ultraviolet Light” report its fluorescence saying:
“Stevensite is found in the trap rocks in the New Street quarry in Paterson, New Jersey, as an alteration of a previous mineral, probably pectolite. The fluorescence is white to yellow under short- and long-wave ultraviolet.”
I have two specimens of fluorescent stevensite. One comes from Paterson in Passaic Co., New Jersey, likely the same locality Manny Roberts was referring to. The other is from Fort Lee in Bergen Co., New Jersey, a different, but close by, locality.
Both fluoresce best under longwave UV light, but also good under midwave. The one from Paterson is also associated with little calcite crystals, which fluoresces red under midwave UV light.
SC807 – Stevensite from Paterson, New Jersey, USA
Fluorescence under midwave UV light.
Normal light.
SC671 – Stevensite from Fort Lee, New Jersey, USA
Fluorescence under longwave UV light.
Normal light.
Fluorescent stevensite in my collection:
SC807 – Stevensite from Paterson, New Jersey, USA
Radiating needles of brown stevensite with a little calcite and quartz. The stevensite fluoresces...
SC671 – Stevensite from Fort Lee, New Jersey, USA
Radiating crystals of brown stevensite. Under longwave UV light it shows some light brown...
