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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.

Photo in normal light.
Fluorescence under shortwave UV light (254nm Hg light).
Photo in normal light.
Fluorescence under shortwave UV light (254nm Hg light).
Fluorescence spectrum under 275nm UVC LED excitation.
Last update: 02 September 2021