Aggregate of brilliant, little reddish, fragmented dufrénoysite crystals. They are arranged in a cavity of the dolomite matrix, along with pyrite. Dufrénoysite belongs to the sartorite group and has a Lengenbach type locality.

Doubly terminated smoky quartz crystal, very well defined, brilliant and transparent. It is disposed on a matrix with adularia crystals.

Group of smoky quartz crystals of a very good size, complete, doubly terminated and with parallel growth. With transparence and brilliance and a uniform smoky tone. It comes from this classic Swiss locality.

Specimen with a visible aggregate of asbecasite, with crystal faces. Yellowish color. Disposed on a matrix with hexagonal crystals of clinochlor. A species not easy to find. This specimen comes from the type locality.

Specimen with a visible aggregate of asbecasite, with crystal faces. Yellowish color. Disposed on a matrix with hexagonal crystals of clinochlor. A species not easy to find. This specimen comes from the type locality.

Rich group of needle to fibrous like dufrénoysite crystals, brilliant and disposed in a vug (12x7 mm) in the dolomite matrix. Dufrénoysite is now a member of sartorite group. With the FGL (Forschungsgemeinschaft Lengenbach) label L-10-4404 and from the Type Locality.

A very curious piece composed by a group of quartz crystals, one of them of greater size, with a slight smoky tone and an exceptional transparence. Black almost metallic inclusions of hematite are observed in the top faces of the crystal. Also on them. With a minor feldspar matrix. A very aesthetic specimen.

Small group of very brilliant seligmannite crystals, like mirrors, gray to dark brown color. They show well defined faces and edges. Accompanied by needle-like crystals of dufrénoysite, with fibrous appearance and almost black color, interpenetrating with seligmannite. A premium quality specimen for systematic collectors. BOTH SPECIES have the type locality in Lengenbach.
Code: LB 779 (1999)

A really interesting specimen of this uncommon sulphosalt. It presents elongated crystals, one with terminal faces, metallic luster and it is accompanied by brilliant realgar red crystals, some of them grew on sartorite. On the LGB dolomite matrix with pyrite. From this classic Swiss locality, type locality for the species.
Code: L 23.729 (1992)

Isolated crystal of asbecasite showing different faces and quite defined forms for the species. Orange color is evident. It is disposed on a matrix with clinochlore and albite. A difficult species to be found. This specimen is from the type locality.

Exceptional specimen of asbecasite. Exceptional for the size of the crystals, their color and abundance. They show some defined faces and some of them are partially covered by chlorite and fine needles schorl-dravite. Not easy to find on the market. From the type locality.

Find specimens of this rare arsenite-silicate is a hard job. In this specimen we have an aggregate of crystals of asbecasite, with a good orange color, with some visible faces, but fragmented. It is accompanied in the matrix by chlorite, quartz and epidote crystals. A specimen to represent the species in a systematic collection. From the type locality for the species.

We always try to bring pieces from our travels to Switzerland. This curious specimen of siderite from the near Goms area is an example. This is a group of rhombohedral siderite crystals that show a curious and unusual curved parallel growth. They are partially covered by calcite and albite, accompanied by brilliant muscovite. From an unusual Swiss locality.