I've been told this by both my Kidney stone specialist and my endocrinologist...
I have a kidney stone pattern that is consistent with people who have crohn's disease, stones are calcium oxalate. I have very high urine oxalate values along with very low citrate values. The fix is to increase citrate. Kidney doctor prescribed potassium citrate, endocrinologist said to take calcium citrate with meals, 500mg Ca as calcium citrate. Makes sense to me and have gone from a stone every week or two to maybe 2 in the past 2 months. A very good improvement that is expected to only get better. Endocrinologist says there's no reason why I should not be able to get rid of them completely after maybe 6 months or so after the ones that have formed already get flushed out... I suffered for many years and it's such an obvious fix, as it turns out.
Now this pattern will not be the same for everyone, but again, as I was told it is typical for malabsorption issues due to Crohn's. If you want to know for sure find yourself someone to order a litholink test, 2, 24 hour urine samples where they test for many things and can tell you what type of stones you're prone to and how to fix it! Upset that It took so long for me to take matters into my own hands and find a specialist or two! My GI, who is a Crohn's expert suggested that I not drink grapefruit, really, lame. She should know better.
As an aside, I am also calcium deficient and was D deficient. Have been taking 10,000 D3 daily for awhile and continue to monitor vitamiin status. D helps with absorption of calcium from the intestines. So while I was getting all the stones, the calcium was actually coming from my bones as evidenced by a high PTH also, bad news for my bones. Hopefully the D andd Ca supplementation is going to turn that around along with the kidney stone issue. Dietary Ca does not = increased kidney stones. There is usually a metabolic reason that can be determined!