Zygocircus Triquetrus-Brooch-Back

Back view of Zygocircus Triquetrus brooch in the shape of a happy donut with 6 spiky nodes on each of the 3 layers. Top and bottom layers are pure titanium, the middle layer is low tarnish sterling silver. The stainless steel bespoke pin back is shown in this view along with the back of the stainless steel fasteners (tiny screws and nuts)