Adamite with Calcite Crystal - Ojuela Mine, Mexico

Contributed by: Mark Cole
Date: Apr 13th, 2026
Locality: Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico (See on Mindat)
Size: 5 x 3.5 x 8 inches
Weight: 3.1 lb

Description:
Translucent calcite crystals partially cover green adamite crystals on a limonite matrix. Ojuela Mine, Mapimi, Municipio de Mapimi, Durango, Mexico. The adamite shows a bright fluorescence under midwave but is respectable under all wavelengths as is the calcite. Very large specimen....

Originally posted by Mark Cole on Nature's Rainbows in 2017.

Fluorescence under midwave UV light.

Fluorescence under shortwave UV light.

Fluorescence under longwave UV light.

Normal light.

Fluorescence under midwave UV light. Closeup.

Normal light. Closeup

Summary of luminescence responses:

Adamite (Mindat) (RRUFF)

• Fluorescence under Longwave (365nm LED) UV light: Green
• Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Green
• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green

• Fluorescence under Longwave (365nm LED) UV light: Blue
• Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Blue
• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue