I consider bright breen stones the most healthiest sign. Green bowel movements is either a sign of liver mud or your stones dissolving as they travle down and out. Normally I see black mud and not so much green mud, or actually a green shaded black mud.
It really doesn't matter, because what ever comes out, wasn't doing you nay good being stored in the liver or lymph.
What method of flush did you do? There has to be a reason for the green and your method may lean a hand on understanding the results.
Be sure and do another cleanse in 5 days or no later than 2 weeks.