This article is about the engine. You may be looking for the episode.

Ametrine is a new engine on Crystal Island that came from the Keystone Railway.


When Ametrine first arrived on Crystal Island, she refused to pull freight cars in the mines.

She later saw sense however, and now works happily with the other engines on the island.


Ametrine is very smart, and enjoys speaking eloquently. She is also very stubborn, which often gets her in trouble. She would rather pull passengers than goods, but since coming to Crystal Island, she has decided that all work is worth doing if it means that she's being a really useful engine.


Ametrine is an LNER D3/4 "Glen" (NBR Reid Class K) 4-4-0 with outer cylinders, Edward and Jordyn are also members of this class.


Ametrine is yellow with purple lining. She has purple leading wheels, as well as a purple dome, and a purple bufferbeam/footplate. She has yellow driving wheels and black tender wheels. She has her name and number on her tender in purple and black, respectively, and her gemstone is on her boiler.



Ametrine's gem

Ametrine has a circular gemstone with a square facet. Half of it is yellow and the other half is purple. It is located on her boiler.



An Ametrine in real life

  • Ametrine is a natural mixture of amethyst and citrine
  • Legend has it that ametrine was first introduced to Europe by a conquistador's gifts to the Spanish Queen, after he received a mine in Bolivia as a dowry when he married a princess from the native Ayoreos tribe
  • Since 1994, a Russian laboratory has perfected the industrial production of bicolored quartz crystals that are later irradiated to bring out the typical ametrine colors
  • Green-yellow or golden-blue ametrine does not exist naturally
  • Artificial ametrine can be created by differential heat treatment of amethyst
  • The colour of the zones visible within ametrine are due to differing oxidation states of iron within the crystal. The different oxidation states occur due to there being a temperature gradient across the crystal during its formation
  • Almost all commercially available ametrine is mined only in Bolivia


  • Ametrine is one of four Crystal Island engines to speak in every one of her appearances, with the others being Star, Padparadscha, and Rutile