Heulandite Subgroup from selected localities.
Bulgaria | |
| Marcus Voigt collection; R. Atanassova, R. D. Vassileva, M. Kadiyski, Z. Zlatev (2012): Crystallographic, chemical and structural characteristics of harmotome from Zlatolist, Eastern Rhodopes, Bulgaria. Bulgarian Chemical Communications, 44 (Proceedings of the IIIrd National Crystallographic Symposium), 7-16. |
| Tschernich, 1992. Zeolites of the World |
Zlatolist, Krumovgrad Municipality, Kardzhali Province, Bulgaria