Prismarine Shard

Prismarine Shards are items that can only be obtained by defeating guardians or elder guardians

Obtaining
Prismarine shards are dropped upon death of either guardian type. 0–2 shards are dropped each time. This can be increased to a maximum of 5 with the looting enchantment.

Trivia

 * Sea lanterns, when broken, do not return the shards used to craft them, only the prismarine crystals.

Prismarine Shard pt-br:Fragmento de Prismarinho 海晶碎片