O7 - Fluorite - Rogerly, England fluorescent minerals Each type of UV output

Each type of UV output can only be used at one time

Deep purple response under longwave and shortwave UV

UV blocking safety glasses block UV rays and provides eye protection when chipping away at rock and boulders

Some even respond a yellow in color in midwave UV at 300nm

O57 chalcedony & calcite from Crawford

O7 - Fluorite - Rogerly, England fluorescent minerals Each type of UV outputFluorite Rogerly, England Deep purple response under longwave and shortwave UV. Rogerly flluorite crystals are highly sought after from England. Crystals can be bright green in daylight if a rust remover is used to remove the rust film from the specimen. Does not affect the fluorescent response. 1 pound 12 ounces Approx. 5" x 4. 5"