"On to some more "scientific" ideas. Some researchers from Harvard are said to have published a paper in the Journal of Urology in 1974 stating that adding (at least?) 300mg of magnesium oxide and 10mg of vitamin B6 will reduce the risk of recurrent calcium oxalate stones by 92.3% I found a reference to a 1967 paper in The America Journal of Clinical Nutrition that does indeed back up this idea (See citation below.)"
V says: Yep, look up solublity product of Mg oxalate vs. Ca oxalate, and find that the Mg salt is 500 times more soluble. kidney stones likely result from lack of magnesium. Remedy I use is small amount of mag chloride in water on empty stomach to run Mg ions thru the kidney which should take out a little bit off the surface of any kidney "stone" present. Done slowly over time, one would never notice