1564 Calcite, Bwlch-y-Cwm Quarry, Tongwynlais, Cardiff, South Glamorgan, Wales September 22, 2019 Steve United Kingdom Wales Click for full sized imageā¦
Africa Namibia 8028 Boltwoodite, Calcite, Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia October 5, 2019
Mexico North and Central Americas 5747 Stibnite, Calcite, Jamesonite, Sombrerete Mine, Sombrerete, Sombrerete Municipality, Zacatecas, Mexico September 2, 2021
Canada North and Central Americas ncat JP0518 Dolomite, Calcite, Marcasite, Barite, Lincoln Quarry (Beamsville Quarry), Clinton Township, Lincoln Co., Ontario, Canada October 11, 2019
Arkansas North and Central Americas United States 5627 Aegirine, Calcite, Jones Mill Quarry (Martin Marietta Quarry; Highway 51 Quarry; Mid-State Quarry), Magnet Cove, Hot Spring Co., Arkansas, USA October 5, 2019