Gem or Gemstone may refer to:
- Diamond
- Emerald
- Ender Pearl
- Eye of Ender
- Glowstone Dust
- Lapis Lazuli
- Nether Quartz
- Nether Star
- Prismarine Shard
- Redstone Dust
- Amethyst Shard
- Ruby, an unimplemented item
- Ruby, in Minecraft Earth
Crystal may refer to:
- End Crystal
- Prismarine Crystals
- Amethyst Clusters
- Adventure Crystal, in Minecraft Earth
- Crystal was a block Notch mentioned adding.