Quartz - Smoky Crystals on Barite - New Britain, Connecticut

Contributed by: Mark Cole
Date: Mar 22nd, 2026
Locality: State Route 9 - Ellis Street and State Route 72 interchanges (State Route 72 roadcut), New Britain, Hartford County, Connecticut, USA (See on Mindat)

Description:
Route 72 roadcut (1974) near Ellis Street, New Britain, Connecticut

Originally posted by Mark Cole on Nature's Rainbows in 2015.

Fluorescence under shortwave UV light.

Normal light.

Summary of luminescence responses:

Baryte (Mindat) (RRUFF)

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

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