A choice Almaden Spanish Cinnabar with great provenance as well. See the excellent Mineralogical Record article on the locale for in depth background. Vintage specimens of this quality are almost never available, this one is rich red, sizable and with old labels including Alvin Schortmann and John Marshall collections. The Shortmann label tells he had this prior to 1939, though this is likely far older. Johns collection card reads "Group of fine sharp xls in center of matrix. The British museum specimen on display is nowhere near as good as this piece." John wrote that in 1991 when he obtained the specimen. A label from Joe Vajdek reads " Very rare, Irreplaceable classic".
The display area also has a number of tiny Calcites scattered on the Cinnabar, which is in several forms and habits. Some micro chipping exists as it does on practically all pieces but his is not noticable without magnification, and is equal to or better than many well known, published pieces. Before the availability of Chinese Cinnabars these were prized as the best specimens in the world.