Flint

Flint is found by mining gravel. There is a 10% chance that a single unit of flint will drop instead of the gravel block. It is possible to farm flint by placing stacks of gravel and mining them down; this is a one-way process, there is no way of turning flint back into gravel.

Harvesting gravel by making it fall on a block such as a torch will not yield flint.

Trivia

 * After the 1.3 update, finding flint is more common.

Feuerstein Silex Kovakő Kiezel Krzemień Кремень