I have a 6 mm stone in right renal culculi. can it be passed through urine easily?

No: Unlikely, you will most likely need to see a urologist

Not easily unless...: 6 mm is too large a stone to pass easily but Chanca piedra, a Peruvian herb, has a long history of folk use for shrinking/dissolving kidney stones and some modern research confirms it actually can help many. More research is needed but it is safe to try; it can be found in Stone Breaker tincture by HerbPharm. See http://cuzcoeats.com/intersections-a-peruvian-herb-attracts-international-attention/