#2766 Calcite, Marcasite France Stone Co. Quarry Logansport Cass Co. Indiana USA (2006) FOV:4.8 mm – Calcite showing double refraction of marcasite blades (not artifacts of focus stacking).
#2766 Calcite, Marcasite France Stone Co. Quarry Logansport Cass Co. Indiana USA (2006) FOV:4.8 mm – Calcite showing double refraction of marcasite blades (not artifacts of focus stacking).