Sil (ochra)
Sil vel saepe nomine Graeco ochra (ὤχρα) est pigmentum naturale. Argilla est cum hydrato oxidi ferri III mixta. Colores habet a flavo ad fuscum.

Bibliographia
 Fuller, Carl; "Natural Colored Iron Oxide Pigments", pp. 281–6. In: Pigment Handbook, 2nd Edition. Lewis, P. (ed.). New York: John Wiley & Sons, 1988.

Nexus interni
 Ochraceus
 Ochroleucus

Mineralia
Pigmenta