Picture of a hexagram on a coin used by Mount Sinai Royal Arch Chapter no. 212 in Toronto was sent to me by a friend who wrote to me that:
The symbol on the bottom right is the "Ark of the Covenant". The bottom left is a "Keystone" which is a central stone at the summit of an arch, locking the whole together. Top left symbol stands for "Templum Hierosolyma". The top right "Scripture". In the middle on the right side are the Tiler's "sword" and Master Mason's "trowel". In the middle on the left side are the working tools of a Royal Arch Mason; the "crow", "pickax", and "spade". In the middle is Moshe Rabbeinu with the Ten Commandments.