Fluorite nestled in Calcite - Hunan, China

Contributed by: Mark Cole
Date: Apr 3rd, 2026
Locality: Hunan, China (See on Mindat)

Description:
Best midwave, but pretty nice shortwave too...

Originally posted by Mark Cole on Nature's Rainbows in 2016.

Fluorescence under midwave UV light.

Fluorescence under longwave UV light.

Normal light.

Normal light. Specimen size image compared to a US dollar bill.

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

• Fluorescence under Longwave (365nm LED) UV light: Red
• Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Red

• Fluorescence under Longwave (365nm LED) UV light: Blue
• Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Blue