Arnold, Jefferson County, Missouri, USA
Marcasite crystals on barite. Alan Goldstein specimen (7259) and photo. FOV = ~6 mm
© Alan Goldstein
Barite sprinkled with marcasite needles on calcite (in a geode-like vug), collected June, 1993. Alan Goldstein specimen (#7259) and photo. FOV = 1 cm
Looking for calcite "geodes" at the Arnold locality in 1993. Photo by Debbie Goldstein.