AN EAGLE-EYED shopper scooped a bargain after gambling on a "mystery" jar at a thrift store.

The find was documented on YouTube in a video that revealed how you can make money on jewelry if you know what you are looking for.

The shopper who goes by Retro Toy Envy on YouTube posted a video of him "taking a chance on a $100 vase of jewelry!"

He bought a mystery vase filled with jewelry for $45 and another for $59.99.

When deciding to buy the jars, he closely examined the jewelry within for any tell-tale signs of value.

In one, he found a gold Victorian horseshoe broach made out of gold.

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When looking at the full case he caught a glimpse of gold and a marking that signified something was 14 carat - it was the pin.

More excitingly, he found two gold Tiffany hearts from a necklace.

"Did I just find a $1200 Tiffany necklace in this $45 mystery jewelry back at the thrift store?" he exclaimed in the video.

With all of the interesting jewelry finds laid out on the floor in front of him, viewers can see the two small gold Tiffany hearts.

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Tiffany sells its mini Double Heart Tag Pendant in 18k yellow gold for $1,500.

At the end of the clip, he does a test using 14 karat acid solution to see if he has found real gold with the hearts, the broach, and a bracelet.

He does the Nitric Acid test where you rub the item on a black stone to leave a mark.

When the solution is added to this mark it will dissolve any metals that are not gold.

With each of the marks staying perfectly visible, it is revealed that the YouTuber has bagged himself real gold.

"I found $1200 in real GOLD at the thrift store," he wrote.

One viewer commented: "The odds of finding a Tiffany in a jewelry jar is 1 in 1,000,000.00.

"Most to find time you find a bunch of garbage in those jars knowing this firsthand."

Meanwhile, a thrift store worker warned that this is a rare occurrence and that the thrifter got lucky.

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They said: "I work in a charity shop and I'm gonna be honest with jewelry we usually check the hell out of these things and are gonna make sure we make the most profit out of the things we can, occasionally this can happen but it's very unlikely."

Another YouTuber has explained how they made over $1,000 selling their second-hand finds by using a specific trick.