Tulipwood from the North end of Lough Neagh.
The design is a hand burnt version of a Pentney Brooch, one of six found in the late 70's in Norfolk. 
Five silver were found, and one with a silver and copper alloy composition. It is also the smallest of all six, at only 6.1cm, and the only one that appears to have been worn. Notably, it also appears to be the oldest in style, dated to the late 8th century (the five silver being 9th).
I had liked that out of all,the smallest was the one worn.
The bowl measures 6.75 inches roughly by 1.5 deep.