Bridget Pericolo had placed the ring in a cup that her husband, Angelo, threw out before leaving their Parsippany home for work.
He contacted a sanitation supervisor, who suggested coming by the dump.
Supervisor Michael Brotons and sanitation workers Edgar Lopez and Joseph McGee went through the refuse until they found the garbage bag that Bridget Pericolo had tied together.
The couple recently celebrated their 55th wedding anniversary.
Information from: Daily Record, http://www.dailyrecord.com