This specimen has a bit of history... The piece was acquired in May 1987 at a fair in Segovia that was held in the Lozoya tower. At that time the labels were rather "approximate". This specimen was labeled as "Poitiers" chalcedony. Looking for intertwined information between chalcedony and France, it turns out that there is a locality where similar chalcedonies appear, near Vienne, in Mauprévoir. Curiously, this locality is in a historical region named Poitou-Charentes (Peitau i Charantas in Occitan), which makes us think that the correct locality is Mauprévoir. Old and fine specimen.

Quartz specimen with groups of crystallized gold. It is accompanied by galena and grey cosalite needles (a bismuth and lead sulfosalt). A gold curiosity of this French mine that was precisely exploited by the "Société des Mines du Bourneix" for the extraction of gold.

A very rich group of torbernite crystals, with an intense green color, brilliance and excellent transparence. We can observe that close to this rich group, the matrix formed by smoky quartz crystals are sprinkled with tabular and tetragonal prismatic truncated by the pinacoids crystals. An amazing specimen for close observation and a piece from a French locality not represented in collections. This mine was worhked for uranium between 1987 and 1989. Also with the quality label of the collection Alain Martaud and from B. Barrière.

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