“Siderite balls (EDS analysed at "Laboratoire magmas et Volcans, Clermont-Ferrand) on colorless fluorite & white baryte.
EDS showed a member of the calcite group : Fe / Ca / Mg ratios are 9 / 5 / 3,5
Field is 6,9 mm large
Zeiss luminar 63 mm on bellows + Nikon D5100. Combine ZP
Self collected june 21, 1986
Photo & collection Chollet Pascal (# 0344)”
Pascal Chollet - 1st March 2009