What you see here is calcite and hematite. Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3), while hematite is a mineral containing oxygen and iron (Fe2O3).
What you see here is calcite and hematite. Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3), while hematite is a mineral containing oxygen and iron (Fe2O3).