SeanR's Frozen North
Flower shaped chalice with gems inside
Oh boy. When the gems on the inside of the cup are filled with the souls of mortal children, the chalice can open a portal to any location the user wants on Golarion. Any number of creatures can pass through the portal once opened.
Found in small tunnels under Stillwater, this chalice is ornately designed. The depression on the top (the bowl) has indentations for 12 jewels, 3 of which have gems in them. The purpose of the Flower Chalice is unknown.