A Wisconsin man digging at a Murfreesboro, Ark., diamond park with his fiancée found a 3.92-ct. white stone, The Associated Press reports.

Eric Blake, 32, of Appleton, Wis., spotted the stone Tuesday along a trail at the Crater of Diamonds State Park when he set down a 70-pound bucket of mud that he was carrying to a wash basin, the AP reports

Blake found a 1.49-ct. stone Monday. The larger one is big enough to fashion into jewelry but Blake reportedly said that he hadn’t decided whether he will have it placed into a setting.

Blake, a carpenter, reportedly said his grandfather had taken him to the state park about 15 years ago and that he returns two to three times a year.

His fiancee Susan Gabrielson—who has a 1-ct. diamond ring—her daughter Sayde, and Susan’s sister Sarah accompanied Blake to the park this week. Susan found a 1.47-carat stone and some smaller gems the previous day.

More than 700 diamonds have been found at the park this year, the AP reports.

The Crater of Diamonds park is the world’s only diamond-producing site open to the public and visitors can keep the stones they dig up. The largest diamond ever found in the United States, the 40-ct. white diamond named Uncle Sam, was unearthed in 1924 at the Murfreesboro park.

JCK