编号 99987539

编号 99987539

Excellent diagenetic gypsum crystal with the typical monoclinic shape that in this case appears rounded and is defined by lustrous faces with very little etching. The main element that separates this piece from others is its zoning with most of it appearing ice clear save for a clay center that displays the original growth shape of the crystal. From the late Cretaceous coal beds of the southern Ebro Basin.