Here’s what you’ll learn when you read this story:A visitor to Crater of Diamonds State Park had her ultimate wish granted when she found a diamond glittering right next to her boot. Most guests at the park either find themselves digging or sifting for diamonds, but some luck out enough to find them on the surface. This one park holds so many diamonds because of a volcanic vent that exploded in the area a hundred million years ago. When Micherre Fox made the trek from New York City to the Crater of Diamonds State Park in Pike County, Arkansas, she was hoping to find a rock worthy of her engagement ring. It is common for diamonds to be found embedded in magma that has hardened into a substance known as kimberlite.