Locality: Charles Davis Mine, N. Groton, NH
Specimen Size: 2.5 mm zone of bright yellow rutherfordine
Field Collected: Tom Mortimer (June 2000)
Catalog No.: u405
Notes: A grain from this zone disolves slowly in cold muriatic acid with a few occasional bubbles, suggesting a carbonate. This yellow mineral is not fluorescent, but the specimen surface has much, nearly (daylight) invisible autunite. The specimen is weakly radioactive. Rutherfordine is reported from the nearby Palermo Mine.
Locality: Chickering Mine, Walpole, NH
Specimen Size: 1.5 mm field of view
Field Collected: Tom Mortimer
Catalog No.: u1155
Notes: Rutherfordine suggested by EDS analysis. (KD set 19). Square outline suggests a replacement of a former uraninite crystal. The earthy yellow zone has a pale green fluorescence in SW UV that is reasonable for rutherfordine.
Locality: Palermo Mine, Groton, NH
Specimen Size: 5.0 mm field of view, daylight and SW UV views.
Field Collected: From a tub of Palermo rocks gifted by Bob Whitmore, 2009
Catalog No.: u2525
Notes: The rutherfordine is surrounded by and aureole of autunite that is invisible in the daylight view.
I have collected and verified rutherfordine from other NH localities, but this is first that I have seen from Palermo. There may be two different minerals here, a yellow one and a cream-colored one.