You know , it's funny, We used to find them here and there. Not the irregular body scales, just the more symmetrical ones. Some of them even appear ground on one side to make the symmetry more exact. They are harder than flint though, and won't fracture on impact.
About 12 years ago me and a buddie did a sifting experiment at one location, totally on a whim, as the fishing was slow. We got about 218 flint and petrified wood arrow points between us in about 8 hours. No dart points, just smaller arrowhead size. There were also about 18-20 gar scales in the same matrix we worked.
If they were in one spot, I'd assume a dead fish, but they were pretty evenly spaced over the 75 feet of bank we worked, and at different depths. That did it for me.
