Amethyst Cluster

Amethyst buds are the first three stages of growth of amethyst clusters, which grow on budding amethyst.

Amethyst clusters are the 4th and final growth stage of amethyst buds.

Natural generation
Amethyst buds and clusters generate naturally as part of amethyst geodes on the sides of budding amethysts.

Breaking
The amethyst cluster block itself in any of its growth stages (rather than its amethyst shard drops) can be obtained by mining it with an iron, diamond or netherite pickaxe with the Silk Touch enchantment. When mined without Silk Touch, only fully grown amethyst clusters drop 4 amethyst shards, while amethyst buds drop nothing. The maximum amount of amethyst shards dropped can be increased with Fortune. Fortune I gives a 1⁄3 chance for 8 shards, averaging 5.33 shards, Fortune II gives a 25% chance (each) to give 8 or 12 shards, averaging 7 shards, and Fortune III gives a 20% chance (each) to give 8, 12, or 16 shards, averaging 8.8 shards.

Budding amethyst
Every random tick there is a 20 % chance for a budding amethyst to spawn a small amethyst bud on any of its sides as long as the block being replaced with the small amethyst bud is air or a water source block.

Usage
Amethyst buds have three growth stages – small, medium, and large – before becoming amethyst clusters. Amethyst buds do not grow when placed on blocks other than budding amethyst.

Amethyst clusters in all its growth stages can be used as a low level light source.