Prismarine Crystals
Material Stack: 64 Since 1.8 (Bountiful Update)
Quick answer: Kill guardians and elder guardians at ocean monuments - the crystals drop alongside prismarine shards.
How to get it
- Kill guardians and elder guardians at ocean monuments - the crystals drop alongside prismarine shards
- Mine sea lanterns without Silk Touch: 2-3 crystals each, up to 5 with Fortune
- A guardian farm over a drained monument produces crystals by the chest
Uses
- Craft sea lanterns: 4 prismarine shards + 5 prismarine crystals, the cleanest light source in Minecraft
- Light underwater builds without ruining them - sea lanterns are water-native
- Stockpile for megabuilds: one monument raid can fund an entire glowing city
Renewability
Renewable: guardians respawn endlessly around ocean monuments.
Java vs Bedrock
Identical in Java and Bedrock.
Related: Prismarine ShardGlowstone Dust