Vivianite (doubly terminated)A very nice, doubly terminated crystal of deep emerald green colored Vivianite is attached to a small amount of red sandstone matrix. The front of the piece is undamaged, but the bottom back area is contacted where it was removed from the pocket wall. The faces are still notably sharp with excellent luster. Specimen #VIVBOL81803

Specimen #MAD61617

and for the most part

but NEVER Polybasite after Acanthite

A worthwhile and aesthetic smaller specimen of this classic material

Specimen # BOL711B54

save the base where it detached from the matrix

and I encourage collectors to not overlook this piece as it’s one of the most interesting and important single Wavellites that I’ve seen from Bolivia

and we’ve taken some micro photos to better illustrate that there are many tiny Polybasite crystals all over the piece

There were very few crystals from the entire find on matrix

Some of the finest quality Prehnite casts were collected in a series of pockets in the middle of the quarry in a dome-shaped structure measuring approximately 40 x 40 x 40 feet (approximately 12 x 12 x 12 meters) that is locally referred to as a diapir

A classic “V”-shaped or “heart”-shaped twin (twinned along the {100} face) of Ferberite from the famous Tasna mine in far southern Bolivia

Several fine quality