Flint

Flint is a mineral obtained from gravel.

Mining
When a block of gravel is mined, there is a 10% chance for a single piece of flint to drop instead of the gravel block. When mined with a Fortune-enchanted tool, this chance increases to 14% at Fortune I, 25% at Fortune II, and 100% at Fortune III. Gravel mined using a tool with Silk Touch or gravel that fell on a non-solid block never produces flint.

Trading
Novice-level Fletcher villagers have a 50% or $2/3$ chance to offer 10 pieces of flint for 10 blocks of gravel and an emerald.

Unlike other villager trades, trading flint is not renewable due to the trade consuming non-renewable gravel.

Drops
When holding an Emerald in hand, some Fletcher villagers will hold flint. If holding, there is an 8.5% chance to drop 10 flint upon death by player. Percentage is increased by looting.

Trading
Apprentice-level fletcher villagers buy 26 flints for an emerald.

Apprentice-level leatherworker villagers have a $2/3$ chance to buy 26 flint for an emerald $$, and always offer the trade $$.

Journeyman-level toolsmith villagers have a 40% chance to buy 30 flints for one emerald in Java Edition and always offer the trade-in Bedrock Edition.

Journeyman-level weaponsmith villagers buy 24 flints for an emerald.