Shine it on this piece in the dark and watch it glow an intense sky blue. This piece has a few cubes that border on gemmy with most bearing the classic Diana Maria mine quartz inclusions throughout the fluorites.The largest cube measures a whopping 4.7cm across, and the piece is accented with what I believe is galena (the metallic substance in the pics) in the matrix. Size: 15.6 x 7.5 x 4cm (large cabinet). Mine Location: Diana Maria Mine, Rogerley Quarry, Stanhope, County Durham, UK. Item comes professionally labeled and is number 273 out of my personal collection. This item is in the category "Collectibles\Rocks, Fossils & Minerals\Crystals & Mineral Specimens\Fluorescent Minerals". The seller is "palmella" and is located in this country: US. This item can be shipped worldwide.