Group of brown fluorite crystals (to 1.7 cm on edge) on vug of dogtooth calcite with a tabular spray of creamy white barite, 3.5 cm. Choice specimen from one of the more obscure Midwest localities. Collected circa 1960s. Old label card says "OBT: 1972. 14.21. Ron Roberts Collection: old number on back 14.21 in black ink.