science, mineralogy, agates, ribboned chalzedon, private collection, agate, gem, gemstone, mineral, minerals, quartz, 20th century, historic, historical, Additional-Rights-Clearences-Not Available

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Photo credit: © INTERFOTO / History / Alamy / Afripics
License: Licensed
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Keywords: 20th, agate, agates, century, chalzedon, collection, gem, gemstone, historic, historical, mineral, mineralogy, minerals, private, quartz, ribboned, science