Gravel

Gravel is a block that is affected by gravity.

Natural Generation
In the Nether, gravel generates naturally in large veins between Y=63 and Y=65 in one-block-deep layers. It often generates without blocks below it, in which case it falls when updated.

Gravel is also found as disks on beaches, near small pools of water, river, in gravelly mountains biomes covering most of the surface and underwater covering the bottom of normal, cold, frozen ocean biomes, and deep variants.

Gravel also generate as part of cold underwater ruins.

Gravel can generate in the Overworld in the form of mineral veins. Gravel attempts to generate 8 times per chunk in veins of size 1–33, at all levels and in all biomes.

Breaking
Gravel can be broken using any tool, but a shovel is the quickest. When broken, it has a 10% chance of dropping flint instead of the gravel itself. The flint received can be controlled with enchantments. Silk Touch removes the chance of dropping flint. Fortune increases the chance to 14% at the level I, 25% at level II, and 100% at level III.

Drops
Flint