Hauyne is a rare member of the Sodalite group, usually formed in low-silica igneous rocks such as lava flows. This fine thumbnail is highlighted by a well-placed, 1.1 cm crystal that has a beautiful grey-blue color and is translucent to gemmy. The Hauyne crystal is exposed perfectly on the scoria matrix. Hauyne was named in honor of the famed, 19th-Century crystallographer and mineralogist, Abbe Rene Just Hauy. Fine aesthetics and size for this uncommon and prized silicate. Orange fluorescence is a bonus. Note this is a tremendously important locality from both a cultural and scientific perspective, and specimens like this are few. Acquired by Kay from a collector named Horman in 1976. ILLUSTRATED in the 64-page article on Kay Robertson, in a 2017 issue of MINERALIEN WELT (PDF and hard copy of this article is available on request). The caption on the photo in the article notes that the editor, Rainer Bode, had his own photo on file from going through the collection back in 2008: Gabriela Kay Robertson vor einer ihrer Sammlungsschubladen. Das Fotoentstand 2008, als Kristina Bode sie in ihrem Haus in Los Angeles besuchte. Links eine hervorragende Hauÿn-Stufe vom Laacher See in der Eifel, die sie von einem deutschen Tauschsammler erhielt. Der Kristall hat eine Höhe von 1,2 cm. Foto R. Bode