Fluorite (penetration twin) (classic material (ex Tom Campbell Collection)

Item Description

A great classic from northern England. Fluorites from Weardale are world famous for the superior form, gemminess, colors and the fact that they are often twinned. This piece is a lovely miniature featuring a predominant penetration twin (on a diagonal twin axis) of cubic purple Fluorite with associated smaller gemmy Fluorites of a lighter hue associated with minor compressed scalenohedral Calcite. The piece is in great shape overall, with only a bit of minor roughness around the edges where it was removed from the pocket wall. On the back of the specimen (not pictured) I also noticed a tiny bit of what I believe to be white Quartz forming casts after a preexisting rhombic mineral (Siderite?). As you can see the fluorescence is excellent under SW UV light. Great quality, form and color for anybody who collects Fluorites, miniatures or UK minerals. Priced at $1,000 in the inventory. From the worldwide collection of Tom Campbell. Tom is a mineralogist and mineral collect who works with us here at The Arkenstone. He has over 35 years of experience in the fields of exploration geology, mining, and applied mineralogy, and has even more years under his belt as a collector! Tom has described many new species over the years, and discovered the rare phosphates Tiptopite, Fransoletite and Pahasapaite. Tom was also a co-author on the second edition of the Encyclopedia of Minerals. You can see a list of Tom's published works here ( https://www.irocks.com/thomas-j-campbell-publications-list ).