http://indigo.ie/~legends/dates.html.
Notice that they indicate that the 'Lia Fail' (Stone Of Scone) arrived in Ireland in 1896BC.
I couldn't link that link. It doesn't make sense that the Stone of Destiny would be in Ireland while the two greatest kings, David and Solomon, were coronated in Palestine. I think Jeremiah took it to continue the Davidic kingline through Tea Tephi.