This article is about the Crystal Island engine. You may be looking for the Keystone Railway engine.

Amethyst is Crystal Island's number 4 tank engine.


Amethyst first appeared when Rex first went to Crystal Island. She played a very minor role in the episode [1].

Later in the same season, Amethyst was first seen joking around with Ruby until Lapis told them to get back to work [2].

Later, Amethyst and Ruby helped Philip and BoCo by showing them what to do [3].


Amethyst is fun-loving and carefree. Loud and full of laughter, she is easily amused and very impulsive. She is also very kind and always eager to help other engines[4].


Amethyst is a freelance design, though she slightly resembles a GNR N2/1, Ryan's basis.


Amethyst is painted lavender with dark purple lining. She has a dark purple dome, and a purple gemstone with a hexagonal facet. She also has the number 4 on her bunker in dark purple.


  • She is slightly based on Amethyst from Steven Universe.
  • Amethyst is the most used Crystal Island engine. This is because Amethyst is Jacobacranmer's favourite Steven Universe character.


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