Tags: Chemical Substance, Mineral.
Samuelsonite is a complex mineral that is found near North Groton Grafton County New Hampshire USA. Additionally it is most commonly found as a secondary mineral in granite pegmatite. Samuelsonite is named after Peter B. Samuelson a prospector from Rumney New Hampshire. The mineral has a pale yellow color and has a hardness of 5 on Mohs scale. The crystal is generally yellow flat and with straited crystals and blue trolleites. Samuelsonite is monolinic.