Gary and Angela Williams of Overton, Lancashire, were walking along Middleton Sands beach near Morecambe Bay when they smelled rotting fish.

They followed the scent until they came across an odd-looking “rock” that appeared to be a chunk of ambergris, sometimes known as “whale vomit,” and used to produce perfume.

After reading about the highly sought-after substance in a newspaper, the couple wrapped the huge lump in a scarf and brought it home.

Gary, 48, then put the lump on his fishing scales and concluded it weighed 1.57kg, which is somewhat larger than a lump discovered several years ago near Morecambe.

The previous specimen of “whale vomit” was worth a stunning £120,000 in 2013.

Gary and Angela, a 49-year-old nurse, are currently in talks with potential buyers about the recently discovered bulge. The stone is about the size of a rugby ball.

Ambergris, which is manufactured from hardened sperm whale intestinal sludge, is regarded as “floating gold” because to its scarcity and high value to perfume makers.

It takes years for the substance to form, and it is thought to protect the animal from the hard, sharp meals it consumes.

It might float in the ocean for several years before washing up on shore.

After prolonged exposure to the sun and saltwater water, it transforms into a smooth, grey lump of compact rock.

Engineer Gary described his and his wife’s revelation as “a bit of a shock.”

He described it as being along a stretch of beach where few people used to walk.

“But it smells awfully bad.” It has a peculiar odor that is reminiscent of a cross between agricultural manure and squid.

“It feels like a really hard rubber ball.” It has a waxy, candle-like appearance.

“Wax sticks to your fingers when you contact it.”

“If it is valuable, it will go a long way toward helping us purchase a static caravan,” he continued. That is, a dream come true.”

They discovered the 1.57 kg of ambergris on Sunday and have since stored it safely while contacting two specialists, one in France and one in New Zealand.

Experts estimated that the 2.7 kg chunk that washed up in Morecambe in 2013 was worth up to £120,000.

A 1.1 kg fragment unearthed on a beach near Anglesey, Wales, was purchased for £11,000 at an auction in Macclesfield, Cheshire, last September.

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