Just Another Diamond Day is the debut album of English singer-songwriter Vashti Bunyan.

In the mid to late 1960s, Bunyan was under contract to Andrew Oldham, which saw her release two singles. However, Bunyan found the experience frustrating, and decided to head for the Scottish islands in search of an artistic commune supposedly established by Donovan. She travelled around the countryside with her partner Robert in a horse-drawn wagon. It was d0uring these travels that she wrote the songs which would later appear on Just Another Diamond Day.

Bunyan returned to London where she was urged by producer Joe Boyd to record her songs while they were still fresh. The recording session took place in December 1969 at Sound Techniques in London. Song arrangements were performed by Robert Kirby, who also worked with Nick Drake. Simon Nicol and Dave Swarbrick of Fairport Convention and Robin Williamson of The Incredible String Band contributed to some tracks. The album was initially released in 1970 but was a commercial failure and Bunyan retired from music for many years.