Travertine - Huntsville, Alabama
Contributed by: FMS Admin
Date: May 7th, 2026
Locality: Huntsville, Madison County, Alabama, USA (See on Mindat)
Size: 3.5 inches
Description:
Alabama is not known for its fluorescent rocks. However, it is home to America's space and rocket program and Huntsville boasts over 240 caves within the city limits, with a staggering 2000 additional caves in the surrounding area. Travertine, a form of limestone deposited by mineral springs, is an often host rock for caves. This specimen, a little too small for any caves, is about 3.5 inches across and fluoresces best under LW, with MW and SW being noticeably dimmer. Shown under longwave UV and natural.
Originally posted by Fire Viper on Nature's Rainbows in 2018.
Summary of luminescence responses:
Calcite (Mindat) (RRUFF)
- Fluorescence under Longwave (365nm LED) UV light: Yellow
- Fluorescence under Longwave (365nm LED) UV light: Yellow