These diagrams can be purchased from a number of craftsmen, including:
- Guślarz
- Keira Metz
- Kowal in Oxenfurt
- Hattori
- Kowal in Novigrad
- Alchemik at the Krematorium
- Kaznodzieja, an alchemist disguised as an Eternal Fire priest in Plac Elektorów
- Handlarz Scoia'tael in the forest outside Novigrad
- Yanne, the blacksmith at Twierdza Kaer Trolde
- Kowal in Wieś Arinbjorn
- Kowal in Fyresdal
- Gremista
- Kowal in Svorlag
- Handlarz at the Samotna chata on Hindarsfjall