Mary Kathleen, Queensland, Australia…
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Kharan, Baluchistan, Pakistan…
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Bou Azzer, Ouarzazate Province, Morocco…
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Berbes, Asturias, Spain…
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Barega Mine, Iglesias, Sardinia, Italy…
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Kintore Open Cut, Broken Hill, New South Wales, Australia…
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Lubin, Lower Silesia, Poland…
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Zarkashan, Gula Khail, Tehsile Mukur, Ghazni Province, Afghanistan.…
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From Minas Gerais, Brazil…
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Age: Carboniferous, 300 Million years old, United States…