GemAttribute
by SoulGatti
GemAttribute lets gems in NeoForge 1.21.1 grant an extra attribute to the item they are socketed into, changing how the player moves, falls and fights.
What it does
Each gem in the mod carries one effect. Amber reduces the time an entity stays on fire, Aquamarine raises movement speed while underwater, and CatsEyeStone increases sneaking speed. ConchPearl speeds up swimming, Helvite adds general movement speed, Jade raises the height a player can fall safely, Mahenge extends entity interaction distance, and Mica increases knockback distance.
The mod is published only for NeoForge, for 1.21.1, with the 1.5.2 file dated 2026-01-12 as the latest build. It is client and server, so the server and every player need it. The code is open source under the GNU Lesser General Public License v3.0 or later, which allows the source to be read for learning mod development.
The Patchouli mod is an optional dependency. When it is installed, the mod provides an in-game guide book describing the gems and their effects.
Key features
Attribute gems
Each gem adds one attribute bonus to the equipment it is applied to, separate from vanilla gear stats.
Movement effects
Several gems change how fast a player walks, sneaks, swims or reaches, so builds and combat routines shift accordingly.
Fall and fire effects
Jade raises the safe fall height, and Amber shortens how long an entity keeps burning.
Guide book with Patchouli
With Patchouli present, an in-game guide book lists every gem and what it changes.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Optional 1
Use cases
Who it’s for: Players who want attribute-style gem progression on NeoForge 1.21.1, and server owners who want a shared set of gem effects. Developers can read the open source code as a reference.
Questions
Does GemAttribute require Patchouli?
Does the server need GemAttribute installed?
Which loader and version does GemAttribute support?
Can the source code be read?
In the catalog
GemAttribute is one of 17,631 Equipment mods on ModsFinder, and one of 7,420 Equipment mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
It's open source, so you can refer to my code to help you learn some mod development.
Official listing
- Modrinth page
- modrinth.com/mod/gemattribute
- Owner
- SoulGatti
- Published
- 2025-12-20
- Updated on Modrinth
- 2026-01-12
- Facts verified
- 2026-10-15