Chalcedony
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- F^ the Journal of \ Y Volume 26 No
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- Moganite - a Common Mineral with a Disapproved Name
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- GEM FOCUS February 2021
- Mineralogical, Geochemical and Gemological Investigation of Artova Ch-Chalcedonies, Tokat – Turkey
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- ENGRAVED GEMS: a HISTORICAL PERSPECTIVE by Fred L
- UCLA Encyclopedia of Egyptology
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- Flint Ridge State Memorial T 291 LICKING