The plaque sitting besides this old stone cross in Eyam churchyard states that it is Celtic. That’s unlikely to be true. It’s an old preaching cross from the 8th/9th century and is really Anglo-Saxon. Before the Norman invasion Anglo-Saxon art and decorative designs were similar to what these days we consider to be “Celtic” style.
It’s an impressive example which is almost complete – although the top of the shaft is missing.
This website provides a good description of it’s decoration
It has some very rich decoration on the west face with fabulous interlacing scroll-work running up the shaft that is typically Mercian in origins. On the west-face, especially the upper section, there are human figures probably St Mary the Virgin with the baby Jesus, angels and Christ in glory, each in their own sections or panels. The cross is grade 1 listed.