Maya eccentric flint knife: A chipped artifact produced by the Maya civilization of ancient Mesoamerica, typically fashioned from chert, chalcedony and obsidian. They were sacred high-status objects assoc. with Maya elite power.
These are called Snyders points, but I understand they're a knife form. The finest examples seem to have been wealth or status items and have been found in high-status burials. This one is made from a nice piece of Keokuk chert from Oklahoma.