Annie Creek, Lawrence County, South Dakota
These two specimens were obtained in 1955, and were identified by Black Hills Minerals (after being thought to be autunite.)
Larger specimen: Minute yellow-green flattened crystal sections on rock. Lean coverage. 5.5x8x3cm Weight 201grams (about 7 ounces). $40.00
Sale pending, sorry! Smaller specimen: (with the red arrow in the picture) Three 1/2mm flattened yellow-green crystals sections on rock. 1.5x2.5x3cm Weight 17grams.