Hi Adrian!
Actually, the
National Kidney Foundation warns AGAINST eating baerries for calcium oxalate kidney stones. They sat to limit high oxalate foods like: peanuts, tea, instant coffee, rhubarb, beets, beans, beets, berries (blackberries, raspberries, strawberries, gooseberries, etc. ), chocolate, Concord grapes, dark leafy greens, oranges, tofu, sweet potatoes and draft beer.
The National Library of Medicine has some excellent information on
kidney stones. Check out the sections on diet...and good luck!