Green’s Dictionary of Slang

Bluestone College n.

[SE bluestone, the material of which the prison is constructed + college n. (3)]

1. (Aus. prison/Und.) Pentridge prison, Coburg, Victoria.

posting to Active Murdoch: Murdoch University Guild 🌐 Have you done time in ‘The Road’ or at the Bluestone College, or at Grafton, or Stewart Creek?
M.B. Read at www.chopperread.com 🌐 For the record, it is because someone cut my ears off when I was in Melbourne’s elite Bluestone College – more commonly known as Pentridge. [...] Below is a little photo of my home for many years. Coburg’s very own Bluestone College. Now this was a true institution, bigger than Eton, Oxford or Harvard.
J.Z. Wilson Prison 57: The ‘mythologising’ of ‘the asset’ began long ago with the emblematising of the structural fabric — the bluestone itself — in the epithet ‘Bluestone College’ .

2. attrib. use of sense 1.

[Aus]M.B. ‘Chopper’ Read Chopper 4 136: Little Miss Parker, the bluestone babe who turned the key on Peter Gibb’s heart.