Stilbite Subgroup from selected localities.
USA | |
| Smith, A. (1996) Collecting Arkansas Minerals; Henry Barwood - unpublished (2010) |
Tschernich, R. (1992): Zeolites of the World, 64; Barwood, H. (2015) Field Trip Report Various Arkansas collection sites . Midwest Chapter Newsletter Volume 29 No.6:5-6 |
Big Rock Quarry, Granite Mountain area, Little Rock, Pulaski County, Arkansas, USA