Calcite & Marcasite

An appealing miniature specimen featuring translucent, scalenohedral to rhombohedral calcite crystals perched on a matrix of brassy, metallic marcasite from the iconic Linwood Mine in Iowa, USA. The calcite displays sharp terminations, while the marcasite glistens with a brilliant metallic luster. This combination highlights the contrasting habits and lusters that collectors prize in classic Iowa mineralogy.