Water Stone Shard
From Pixelmon Wiki
A Water Stone shard is a piece of a Water Stone, an evolution stone used to evolve certain Water-type Pokémon.
Water Stone shards are obtained from Water Stone ore, which can be either be found in deep water or inside frozen shrines. The ore emits some light, making it easier to spot underwater. They can also be obtained from Forage.
Nine shards are needed to craft one Water Stone.