A term for a vagina that is likened to and comes from Van Dell jewelry which according to its website is "imitation stones simulating gemstones" but "is not cheap and enjoys highbook prices".
Wilberforce: "That lady yonder, is she a mackerel or a maiden?"
Hastings: "Why she's hardly Van Cleef, my good fellow. Pay a visit to that chamber and you will find only Van Dell".