Heulandite Subgroup from selected localities.
Switzerland | |
| Stalder, H. A., de Quervain, F., Niggli, E., Graeser, St., Die Mineralfunde der Schweiz, (1973), p.124/5 |
| Christian Bracke collection. |
Switzerland | |
| Stalder, H. A., de Quervain, F., Niggli, E., Graeser, St., Die Mineralfunde der Schweiz, (1973), p.124/5 |
| Christian Bracke collection. |
Alte Bach, Lax, Goms, Valais, Switzerland