The reality TV star told ABC News' Chris Cuomo on "Good Morning America" that he set down his ring one day and it vanished. He says no one else could have taken it.
Photos: The Gosselin Family
He also accuses Kate of verbally abusing him and beating him down during their marriage.
Jon's remarks came from his first TV interview since divorce papers were filed in June. Kate has made a number of her own interview appearances in recent weeks.
The Gosselins continue to co-star on TLC's hit reality show "Jon & Kate Plus 8," which documents the challenges of raising their twins and sextuplets.
A longer version of Jon's interview airs tonight on ABC's "Primetime: Family Secrets."
Jon: I took Abuse From Kate