Heulandite Subgroup from selected localities.
Faroe Islands | |
| Sussex Mineral and Lapidary Society (SMLS) Journal 234 Nov/Dec 2011 |
| No reference listed |
Collection of Volker Betz | |
Tschernich, R. W. (1992): Zeolites of the world. Geoscience Press, Phoenix, Arizona, p.256 | |
| Collection of Volker Betz |
Burvald, I. (2003): Mineralforekomster på Færøyene. Norsk Bergverksmuseums Skrift 25, 29-34 |