Ultima Silk may refer to:
- The material from Final Fantasy Crystal Chronicles: Ring of Fates.
- The material from Final Fantasy Crystal Chronicles: Echoes of Time.
- The item from Pictlogica Final Fantasy.
Ultima is Latin, and in many of today's Latin-based languages, for "The Last", in its feminine sense. However in the Spanish versions of many Final Fantasy games the spell name is "Artema", a closer transliteration of the original Japanese katakana.