Goethite Pseudomorph after Selenite | Mexico

A extraordinary and highly structural pseudomorph specimen from Mexico. This piece features razor-sharp "blade" formations where iron-rich Goethite has completely replaced former Selenite (Gypsum) crystals while preserving their original geometric habit. The dark, metallic-to-earthy luster and delicate, hollow cast architecture make this a fascinating conversation piece and a prized acquisition for collectors of pseudomorphs and fine Mexican mineralogy.