Cap'n Bob's Quahog Pearl

I own a fish market and find very small white pearls in my quahogs on a regular basis but today I found a pearl measuring slightly larger than 1.5 cm round and 0.6 cm tall. It is egg shaped but with a flattened bottom. The color is a peachy brown that fades from the top. There is a large blemish on one side and I wouldn't say the luster is better than fair but this sucker is big. It is about the size of a milk dud. Can anyone give me an estimate of value?