This rock caught my eye, found near the waters of the st Lawrence river in quebec, canada. After a quick rub it looks sandy-ish or something if you see the detail, its about an inch big and it got me curious as to what this may be exactly if anyone knows.. i have no idea other than maybe some sort of calcite or a sand stone since just by looking at it seems like a rock fully made of the sand crystals of those waters maybe.. thanks for any help