Garnet is a narrow gauge mining engine from Crystal Island.
Garnet is based on the Talyllyn Railway's Dolgoch.
Garnet is painted red with her name on her boiler in black. She also has 2 hexagonal gemstones on her boiler, one red and the other blue.
Garnet tends to act on intuition rather than seriously analyze a situation. For the most part, this works out well, but it has lead to some disastrous outcomes. While mostly level-headed, Garnet occasionally demonstrates a fierce competitive spirit. She is also the peacemaker of the Mining Engines, and usually one to make peace with Jasper and Peridot when they cause trouble.