C11 - Longwave Fluorescent Mineral Kit (10 Specimens) willemite In regards to the specimen

In regards to the specimen best under shortwave green willemite and red calcite

Duller yellow response under shortwave UV  9

The output of longwave LEDs are exceptionally strong because of technological advancements

Very special Calcite from Mexico with multi response under UV

Under longwave UV fluorescent white response

C11 - Longwave Fluorescent Mineral Kit (10 Specimens) willemite In regards to the specimenEnjoy a extra unique collection of 10 fluorescent mineral specimens that respond and change color under LONGWAVE ultraviolet light. Only about 9 out of 10 specimens will respond under longwave UV aka a blacklight. These do make these specimens harder to obtain. Each specimen ranges in size from 1 to 1 1 2 inches and are labeled and bagged individually in their own seperate baggie. Some specimens may also change to more than one color when exposed to