Humite, Pargasite, Spinel – Luc Yen, Vietnam

Contributed by: Mark Cole
Date: Mar 24th, 2026
Locality: L?c Yên District, Yên Bái Province, Vietnam (See on Mindat)

Description:
Originally posted by Mark Cole on Nature's Rainbows in 2015.

Fluorescence under longwave and shortwave UV light.

Summary of luminescence responses:

Humite (Mindat) (RRUFF)

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

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

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