On the subject of the strange geometrical shaped design on the Spear I was looking through Omani Silver and found the rectangle similar to it on jewelery from the Sharqiyyah... (Eastern Oman) which represents a devil or evil spirit worn to ward that off from the wearer. It looks quite similar to the shape sometimes used for the Evil Eye which may have a central cross which is there to scatter any evil spirit in The Four Directions... or dots often in a 5 geometry configuration which you can also see at the Khanjar a few posts back.
The item is top right below..
