SC402 - Montebrasite
Locality: Berry-Havey Quarry (Havey Quarry; Berry Quarry), Poland, Androscoggin Co., Maine, USA (MINDAT)
Size: 8 x 5.5 x 2.0 cm - Cabinet (6-10 cm)
Weight: 161.4 g
minID: XGX-6ME
Piece of solid montebrasite, a Li-Al phosphate. Under shortwave UV light, it fluoresces a nice green, due to uranyl inclusions. Due to the zoned and patterned fluorescence, I’m not sure if it is the montebrasite with the green fluorescence, or something else (opal? secondary uranium mineral?) included in the montebrasite.
