Specimen V4559 is identified as ettringite, portlandite, calcite (synthetic ?)(X-ray #5661 , 5662). The physical location is given as Crow's Nest Natural Preserve, on the Potomac River, Stafford Co., VA. The location coordinates were not recorded and are represented here by the county centroid. The specimen is stored in the DGMR Repository Storage Cabinet number 6, Drawer number 2.