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Mastery Gems were gems that originally customized the graphical effect of one or more hero abilities, while Kinetic Gems customized model animations. They were hero-specific.
After the August 14, 2014 Patch, Mastery Gems and their functions were merged with Kinetic Gems.
Previews can be found on each gem's individual pages.
August 14, 2014 Patch
- Merged with Kinetic Gems.
- All existing Mastery Gems have been converted to Kinetic Gems.