Red Fluorescent Spinel - Luc Yen, Vietnam

Contributed by: Chris Clemens
minID: 9E8-413
Date: Apr 27th, 2026
Locality: L?c Yên District, Yên Bái Province, Vietnam (See on Mindat)
Size: 64 x 41 x 66 mm
Weight: 194 g

Description:
Raspberry red colored, octahedral, spinel crystals in a white marble matrix. The spinel fluoresces deep red under longwave UV but is not fluorescent under shortwave. The marble matrix is also fluorescent under longwave and shortwave UV and shows a moderate blue/white response.

Originally posted by Chris Clemens on Nature's Rainbows in 2017.

Fluorescence under shortwave UV light.

Fluorescence under shortwave UV light.

Normal light.

Summary of luminescence responses:

Spinel (Mindat) (RRUFF)

• Fluorescence under Longwave (365nm LED) UV light: Red