Fluorescent Black and White Agate from Chihuahua, Mexico
Contributed by: FMS Admin
Date: Feb 24th, 2026
Locality: Chihuahua, Mexico (See on Mindat)
Size: 3.5 x 3 x 4.5 inches
Weight: 2.75 lb
Description:
Black and White agate with pockets of calcite and aragonite. Not as spectacular in daylight as Crazy Lace Agate [also from Chihuahua] but it more than holds its own when it comes to gentle pastel fluorescence. Four SW pictures and a daylight one. LW and MW fluorescence dim.
Fluorescent pictures were taken at ISO-100, f/11 for 2.5 seconds.
Originally posted by John Rofrano on Nature's Rainbows.
Summary of luminescence responses:
Chalcedony (Mindat) (RRUFF)
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red