Description
Large, perfectly automorphic azurite crystal (~2.5 cm), bright blue in a very colorful green fibrous malachite “geode”, all in a very heavy nodule of iron and copper oxides.
Not common!
The kind of old, quality specimen you don’t see every day…
Mineral species from the former copper mine (exploited in the 19th century, around 1812/1830) at Chessy les Mines in the Rhône department, north of Lyon.
A remnant of an early handwritten label is visible on the sample (De Chalendar collection probable).
The video below will give you a better idea of the interest of this Chessy specimen:
This post is also available in: French
