Bisbee 1

The Donna Anna Claim, also known as Doña Ana, is located near the Bluebird Mine in the Little Dragoon Mountains and is a unique locale for fluorescent minerals.  Many of the typical Arizona fluorescents such as Calcite and Willemite are not found there, but, rather, there are a number of oddballs the most distinctive of which is Fluorite.  This Fluorite glows the usual violet/blue under longwave UV but under shortwave it glows a light pink color.  For this reason I sometimes refer to it as "reverse Terlingua".  This unusual response is thought to be the result of the presence of rare earth minerals. Collecting is very difficult at this location and so the prices on these pieces are a little higher than usual.