204 Cole's Wattle Seed Oxalate Oxalate tends to form bonds with metal ions to produce an insoluble precipitate. One such is calcium oxalate that has been linked to the development of kidney stones. false false The roasting process was found to reduce this oxalate present by around 30%. report shows moderate levels of oxalate in Acacia colei seed (2.17 – 2.39 g/100g), much lower than that found in common vegetable such as cabbage and sweet potato 8,919