I have purchased some in the Dekalb Farmers Market that were red in color as well as some from the Asian Market on Buford highway which were green in color.

I found some growing locally at a business in Scottdale, Ga. The owner has told me that they are Prickly Pear and that he has seen a couple of his employees eating them.

Are there any of these that may be dangerous?

I have looked this up on the internet and in one article it says that MOST are edible.