Lorenzenite from Rasvumchorr Mt, Murmansk Oblast, Russia

Contributed by: Simone Conti
minID: W3Y-ENF
Date: Jul 12th, 2026
Locality: Rasvumchorr Mt, Murmansk Oblast, Russia (See on Mindat)
Size: 7 x 3 x 8 cm
Weight: 215.5 g

Description:
A complicated rock. The main actor is the light gray, fibrous mineral, fluorescent light green under shortwave UV light. Lorenzenite, according to the label, pseudomorph after parakeldyshite. Under midwave UV, some mineral fluoresces blue/violet. No idea what that is. On the "back" side, there is also an elongated mineral, fluorescent pink/violet, and a spot of very bright blue fluorescence, mostly longwave. Could be dust, or something more fun. A lot of different minerals also discernible under daylight, but again, no idea what they are.

Fluorescence under shortwave and midwave UV light.

Normal light.

Fluorescence under shortwave and midwave UV light.

Normal light.

Summary of luminescence responses:

Lorenzenite (Mindat) (RRUFF)

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green