Minecraft (Pocket Edition)
Flint is best obtained from mining Gravel with a Shovel. There is an 8-10% of Flint being dropped from Gravel in this method. If Gravel is dropped it can be placed again as a block and re-mined with a Shovel. All Gravel will eventually drop Flint if it is mined this way enough times.
Usage / Purpose
Flint is stored in stacks of up to 64 units.