Radiating Tremolite with Caliche - Sunset South Mine, Maricopa County, Arizona

Contributed by: FMS Admin
Date: Feb 25th, 2026
Locality: Sunset South Mine, Maricopa County, Arizona, USA (See on Mindat)
Size: 3 x 1.5 x 4 inches
Weight: 10.625 oz

Description:
RADIATING TREMOLITE WITH CALICHE FROM THE SUNSET SOUTH MINE, MARICOPA COUNTY, AZ.
Caliche on the first side but not on the 2nd side.

Fluorescent pictures were taken at ISO-100, f/11 for 1.3 seconds.

Originally posted by John Rofrano on Nature's Rainbows.

Fluorescence under shortwave UV light.

Fluorescence under shortwave UV light. Side 2

Normal light.

Summary of luminescence responses:

Caliche (Mindat) (RRUFF)

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

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