Vellum is prepared animal skin or membrane, typically used as writing material. It is often distinguished from parchment, either by being made from calfskin, rather than the skin of other animals, or
Magna Carta, written in Latin on vellum, held at the British Library
A vellum deed dated 1638, with pendent seal attached
Quran from the 7th century written on vellum
A Volume Of Treatises on Natural Science, Philosophy, and Mathematics (1300) Ink on vellum.
Parchment is a writing material made from specially prepared untanned skins of animals—primarily sheep, calves and goats. It has been used as a writing medium in West Asia and Europe for more than two
Central European (Northern) type of finished parchment made of goatskin stretched on a wooden frame
Parchment with a quill and ink
Latin grant dated 1329, written on fine parchment or vellum, with seal
A 1385 copy of the Sachsenspiegel, a German legal code, written on parchment with straps and clasps on the binding