Snowball Geode - Trancas, Chihuahua, Mexico
Contributed by: FMS Admin
Date: May 8th, 2026
Locality: Estacion Trancas, Aldama Municipality, Chihuahua, Mexico (See on Mindat)
Size: 4 inches
Description:
Geodes are great fun. They are much better than Easter Eggs during an egg hunt, and this one was found during such an escapade. Momma always told me, "Geodes are like a box of chocolates, you never know what you're gonna get." When we cracked this one, not only did we find fluorescent chalcedony, we also found a "snowball"! It is a decent sized geode, about four inches in diameter.
Originally posted by Fire Viper on Nature's Rainbows in 2017.
Summary of luminescence responses:
Chalcedony (Mindat) (RRUFF)
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green