Chalcedony - Burro Creek Agate Occurrence, Arizona

Contributed by: FMS Admin
minID: XTX-VV8
Date: Feb 21st, 2026
Locality: Burro Creek Area Agate occurrence, Mohave County, Arizona, USA (See on Mindat)
Size: 12 x 5 x 16 cm

Description:
This material is variously called chalcedony, agate, or pastellite jasper. It comes from an area south of Burro Creek. Pale blue in white light, under SW it fluoresces green and white, while under LW it fluoresces a combination of greenish, blue, and cream. The white/cream fluorescing mineral is undetermined.

Originally posted by Dennis Michael on Nature's Rainbows.

Fluorescence under shortwave UV light.

Fluorescence under longwave UV light.

Normal light.

Summary of luminescence responses:

Chalcedony (Mindat) (RRUFF)

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