The origins of a 1,100-year-old brooch found in a lorry-load of soil may be “a mystery” that is never solved, say archaeologists.
The late 9th Century silver disc was discovered in a field in Great Dunham, Norfolk, which had recently been landscaped.
It is not known where the soil came from, but experts say the find is similar to the nearby Pentney Hoard.
The British Museum said the discovery was of “national importance”.
An inquest – the process by which the find may be officially declared treasure – has been opened in Norwich and will conclude on 9 June.
The brooch was found by an inexperienced detectorist on 9 May 2019, on just his third day detecting.
He initially thought the piece was Victorian, but when archaeologists at Norfolk County Council were alerted they visited the scene to excavate further.
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