I've tryed a few times to make a good cumberland out of talahata quartzite. This is the 1st good one I've been able to make. Its fully fluted on one side and within 1.5 inches of the tip on the other. In the 2nd photo I'm showing were the short flute ended. There was some sorta organic stuff that stopped the flute, like old wood or something weird. Its 5 3/4 inches.