Jack Pearadin and Doug Nelsen found a 1.73-carat diamond after nearly a year of searching the park's field.
Austin's Charlie Pierce brings his piano-driven boogie-woogie trio Choctaw Wildfire to the White Water Tavern, 9:30 p.m., $5. The Exchange in Hot Springs hosts Manus Mortis, The Weeping Gate, All Is At An End and Conviction, 6:30 p.m., $5.
Sway hosts "Lady Boi's Playpen, Ep. 1: Toybox," a toy-themed dance party, $7-$9. The Clinton School of Public Service presents a lecture on Arkansas politics in the 1970s, "Legacies & Lunch: Happy Hours and High Times," at the Ron Robinson Theater, noon, free. Good Foot plays funk-driven originals and covers at Four Quarter Bar, 9 p.m. Jeff Coleman and the Feeders take the stage at TC's Midtowne Grill in Conway, 9 p.m., $8-$12. Vino's hosts an all-local metal show with Sychosys, JudgeMental and Undercover Devil, 9 p.m., $6.
Big Piph and Tomorrow Maybe debut the new living album "The Legacy Project" at Revolution, 10 p.m., $10. School of Rock, an immersive children's rock workshop, stops at Stickyz, 8:30 p.m., $5. Hillbilly outfit Mountain Sprout plays at King's Live Music in Conway with opener Cosmic Farmer, 8:30 p.m., $5. The River Market celebrates its 20th birthday, starting with the Farmers Market at 7 a.m., the "Garden Gourmet Chef" series at 9 a.m. and music from Rodney Block and Big Dam Horns at 5 p.m., River Market pavilions, free. Mark Currey plays a set at Kent Walker Artisan Cheese, 6 p.m., free. Canaan, Moonwalks and The Sweet Nothings share a show at Maxine's in Hot Springs, 9 p.m., $5. Word Virus Book Club hosts a discussion about "Echo Ellis: Adventures of a Girl Reporter" with author Suzi Parker, Vino's, 2 p.m., free. The Mid-America Science Museum in Hot Springs hosts Tesla Fest with free cupcakes and ice cream for the first 160 visitors, $8-$12. The Latter Half, Better on Paper, Smoke Signals and Good Monday play an early show at Vino's, 7 p.m., $6.
Hellzapoppin Circus Sideshow Revue goes for thrills at Revolution, 8 p.m., $8-$12.
The Central Arkansas Boys and Girls Club celebrates its 100th anniversary at Cache Restaurant with music from Kevin Blake Goodwin, John Neal and Tyler Sellers, 6 p.m. Rockabilly quartet The Broken Hipsters honky-tonk it at White Water, 9 p.m., donations.