1) Monoclinic mineral
Found on
https://www.crosswordclues.com/clue/samuelsonite
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 scal...
Found on
http://en.wikipedia.org/wiki/Samuelsonite
No exact match found.
