Minerals from the Michel Maigrot collection (1950-2019), he was one of the most important mineral collectors in France in the 1970’s and 1980’s, but also a researcher/grater of first strength. As such, he is probably the first in France to have been a ‘professional’ researcher. He had opened a private museum in the castle of Joyeuse in Ardèche, which we bought entirely in the 2000s.