For years, Mitzi Perdue regarded down at her hand and noticed historical past.

The emerald stone on her ring finger instructed a narrative stretching again almost 4 centuries, to the sinking of a Spanish galleon close to the Florida Keys in 1622 and a decades-long effort of a colourful undersea treasure hunter named Mel Fisher to retrieve its payload of gold and silver cash, gold nuggets and jewellery.

It reminded her, too, of her late husband, the hen magnate Frank Perdue, who obtained a share of the bounty in return for his funding in Mr. Fisher’s search. He donated most of it, however stored the emerald and offered it to her when he proposed marriage in 1988. She wore it till his demise in 2005, when she put it away for safekeeping.

Now, 400 years after the Nuestra Señora de Atocha sank in a hurricane, Ms. Perdue, 81, is placing the emerald up for public sale on Wednesday at Sotheby’s in New York Metropolis. All proceeds from the sale of the ring, which Sotheby’s says has an estimated worth of $50,000 to $70,000, will likely be donated to help humanitarian efforts in Ukraine, prompted by Ms. Perdue’s go to there this 12 months after the Russian invasion.

“What should it’s like for the individuals who have been there enduring, constantly with no respite, for not less than half a 12 months?” she stated. “After 5 days, I wished to do extra. After which I began considering, ‘What can I do to be most useful?’ After which I assumed, ‘I personal one thing that’s of historic significance.’”

The Nuestra Señora de Atocha set sail from Havana for Spain on Sept. 4, 1622, with a payload that included 180,000 cash, 24 tons of ingots struck from Bolivian silver, 125 gold bullion bars and 70 kilos of rough-cut emeralds mined in present-day Colombia. It had been crusing for under a day when it and one other vessel, the Santa Margarita, have been struck by a hurricane and sank west of Key West.

Mr. Fisher, who died in 1998, had been obsessive about treasure searching since studying “Treasure Island” by Robert Louis Stevenson as a boy. After serving within the Military in Europe throughout World Battle II and learning engineering at Purdue and the College of Alabama, he briefly turned to hen farming in California earlier than opening a diving store in Redondo Seashore, Calif. He moved his household to Florida in 1962, lured by the promise of discovering offshore treasure.

He and his associates used trendy electronics to get better gold and different artifacts from wrecks of a Spanish fleet that sank in a storm off Florida’s Atlantic coast in 1715. By 1969, he had launched into a seek for the Atocha, which he had examine in a ebook known as “The Treasure Diver’s Information.”

The seek for the Atocha’s treasure proved expensive for Mr. Fisher. It consumed greater than 15 years of his life, and he misplaced a son and daughter-in-law when their boat capsized and sank in 1975. Lastly, in 1985, Mr. Fisher and his group situated the wreckage of the Atocha and recovered about $400 million price of treasure.

“While you’re the primary particular person to see one thing after three or 4 hundred years, it simply offers you goose bumps,” Mr. Fisher’s son Kim Fisher, who joined his father’s seek for the Atocha when he was 12, stated in an interview. “And it simply makes you need to discover extra.”

Inspired by a detailed buddy, Frank Perdue signed on as a patron of the expedition and solid a bond with Mr. Fisher over their shared historical past of hen farming. Mr. Perdue was on the pinnacle of his fame as an unlikely TV pitchman — “It takes a troublesome man to boost a young hen” — for his firm, Perdue Farms, when the Atocha was present in 1985.

Mr. Perdue was given a share of the treasure proportional to his funding. He gave most of his gems and silver and gold cash to the Smithsonian Establishment and to Delaware Technical Neighborhood School, the place they’re on show in an exhibit known as “Treasures of the Sea.”

However Mr. Perdue stored two objects for himself: a gold doubloon and the emerald.

Mr. Perdue met the girl who would grow to be his third spouse at a celebration in Washington, D.C., not removed from his residence in Maryland. They courted by telephone for a few month — Ms. Perdue was residing in California on the time — and the following time they noticed one another, she stated, he went to his secure and retrieved the emerald ring. They have been married in 1988.

“When he gave me the emerald he bought from the Atocha, nothing on the earth could possibly be extra thrilling — aside from being engaged,” she stated.

The emerald was mined in Colombia within the seventeenth century. Alexander Eblen, a senior specialist of Sotheby’s jewellery division in New York, stated it was a pristine instance of an old-mine emerald.

“This can be a stone that could be a Goldilocks stone,” he stated, “the place it’s a really robust inexperienced, a pure inexperienced, and likewise neither too mild nor too darkish.”

Its estimated worth of $50,000 to $70,000 is predicated solely on the situation of the gem, Mr. Eblen stated. Bidders on the public sale, that are more likely to embrace museums and personal collectors, can even keep in mind its historical past in addition to the trigger they’re supporting, he stated.

Ms. Perdue traveled to Ukraine earlier this 12 months to study extra about human trafficking, a topic that she writes about for Psychology Right now. Due to an air raid menace, she spent her first evening in Kyiv in a bomb shelter, and it ended up being one of the crucial consequential experiences of her life, she stated.

She considered her engagement ring, which she had stored in a secure since her husband’s demise, and it occurred to her that she might use it to boost cash and consciousness of struggling in Ukraine because the Russian invasion. She stated she didn’t but know which group she would select to obtain the proceeds.

When Mr. Perdue proposed, she initially thought she would put on the ring just for particular events, however her husband satisfied her that it was price carrying day by day. She stated she was glad she adopted his recommendation, particularly because the emerald strikes on to the following chapter in its 400-year story.

“I’d like to shake the hand of the one that will get it,” she stated, “and to want them success and pleasure.”