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Welo (Wello; Wollo), Afar Province, Ethiopia
Outstanding precious fire opal occurrences.
The opal forms thin layers in a Tertiary ignimbrite rock, or fills voids in plant fossils within this rock.
The main occurrence is near Tsehay Mewcha.
Mineral List
Mineral list contains entries from the region specified including sub-localities| Graphite Hollandite | Opal Pyrite | Quartz var: Chalcedony |
6 entries listed. 4 valid minerals.
Localities in this Region
Ethiopia
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References
- Rondeau, B.; Mazzero, F.; Bekele, E.; Gauthier, F. P.; Fritsch, E. (2009): New play-of-color opal from Welo, Ethiopia. Gems & Gemology, 45, (1), 59-60.
- Schäfer, K. (2012): Feuer im Wasser: Die Vorkommen von neuartigem Edelopal in Äthiopien. Lapis 37 (2), 13-16 (in German). [with explanation of unusual behaviour during cutting and drying]
- Schäfer, K. (2012): Feuer im Wasser: Die Vorkommen von neuartigem Edelopal in Äthiopien. Lapis 37 (2), 13-16 (in German). [with explanation of unusual behaviour during cutting and drying]
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