Chalcopyrite colorful,rainbow( Mexico)

The price shown per gram.

The size of the wreckage 2,5-5,5 cm, weight from 10-43 grams.
Price without choice 15 RUB/gram, a choice of 20 RUB/gram.

Chalcopyrite is fairly easily recognizable by characteristic colour, and hardness, differ sharply from pyrite, which break often covered tarnish.
Very interesting and original material on the Mexican copper mines. All fragments of a Golden colour, but covered with a thin film "or" oxide of copper (a natural process of change and formation of new minerals).
The photos are very high quality,selected, with rich-colored natural film( tarnish) Chalcopyrite.

Very easily soiled,therefore, for decorations,of course not...on the hands is a black mark..but perfect as a standalone specimen in your collection.