One of the prides of the Lockhart collection, and something I have long admired as he built it, is the breadth and depth of this suite of Swiss minerals. We have all seen various colors and styles of the famous Swiss pink fluorites, but when have you seen blue fluorite from Switzerland? This is a remarkable cabinet sized large display specimen, from a famous (now) tourist cave in the Rhine Valley. This is a totally different geological environment than all the other Swiss (Alpine) fluorites we are familiar with, and seldom seen for sale. Sold to Brent by Siber & Siber of Switzerland, from an older collection.