A 93-pound Petoskey stone found in Lake Michigan was later confiscated by the Michigan Department of Natural Resources 10 years ago. It is now on display at the DNR's Outdoor Adventure Center, 1801 ...

It’s also a stone of good fortune and prosperity. After all, another thing that’s well-known for being green is cash! May’s secondary birthstone is agate. Agate is less rare than emeralds ...