Rosell Minerales

In this piece, three very interesting magnesium species, two hydroxilcarbonates and one hydroxide coexist. On the one hand we observe some aggregates of foliaceous crystals of dypingite, forming rosettes, white color, although they are colorless. They are accompanied by sheaves of flattened crystals of hydromagnesite. All of them are disposed on a rock matrix with blue to gray brucite. A Catalan piece that is hard to find today, with unusual species and quality.

Size: 6 x 5 x 3.2 cm.
Found in 1970's.

Col. Manchion (Barcelona).
Classic locality

Hydromagnesite specimens from "Pedreres de l'Àngel" (Angel quarries), in Gualba (Barcelona), are a classic for the Catalan mineralogy. In this specimen we can observe some aggregates formed by radiated crystals, some of them of good size (more than 2 cm.), others smaller (up to 8 mm), very brilliant. Nowadays impossible to be found... This mines are a skarn due to contact metamorphism of Hercynian granodiorite and biotite granite into Cambrian marbles.

Size: 9.4 x 6.5 x 3.5 cm.
Found in 1980's.

Col. Arguijo (Barcelona).
Fluorescent under long wave UV

This kind of specimens are which make the love for minerals is being reinforced. In this piece, three very interesting magnesium species, two hydroxilcarbonates and one hydroxide coexist. On the one hand we observe some aesthetic and brilliant aggregates of foliaceous crystals of dypingite, forming rosettes, of intense white color, although they are colorless. They are accompanied by sheaves of flattened crystals of hydromagnesite, between translucent to transparent, colorless (they are similar to aragonite). All of them are disposed on a rock matrix covered with a layer with botrioidal forms, from blue to gray, of brucite. A Catalan piece that is hard to find today, with unusual species and quality.

Size: 8.5 x 7.0 x 6.0 cm.
Found in 1970's.

Ex. L. Daunis (Barcelona).
Analyzed specimen with report