My husband was eating a Yoplait Harvest Peach Yogurt that I put in his lunch and luckily he noticed the hard form on his spoon and didn't bite into it. He kept it and brought it home to me to see what I thought it was. I believe it is a piece of a peach pit. Just wanted to bring this to the attention of Yoplait as this could have broke a tooth if my husband wouldn't have noticed it on his spoon. I have provided an attached photo (comparing it to a dime).