Pietersite is a gem engine from the Keystone Railway.
Not much is known about Pietersite, but it can be assumed that she dislikes being bossed around by Goldstone.
Pietersite is a freelance design. She appears to have a Fowler tender.
Pietersite is painted blue with orange lining. She has orange tender wheels and an orange bufferbeam/footplate. She has two orange and blue gemstones on her tender.