Ankerite

Ankerite Ca(Fe,Mg,Mn)(CO₃)₂, with Quartz, Jeffrey Quarry, Pulaski Co., Arkansas

Ankerite Ca(Fe,Mg,Mn)(CO₃)₂, with Quartz including doubly terminated crystal, Jeffrey Quarry, Pulaski Co., Arkansas

Ankerite Ca(Fe,Mg,Mn)(CO₃)₂, with Quartz including doubly terminated crystal, Jeffrey Quarry, Pulaski Co., Arkansas