Zack found this incredible necklace could be worth up to £1million if made with natural pearls.

He explained: “Queen Elizabeth has some of the most valuable jewels in the world, so it would be fair to assume that this three-strand pearl necklace and her earrings are made from natural pearls.

“Only a very small percentage of pearls used for jewellery are natural, with most of them being cultured. 

“If these pieces are made up from natural pearls, they are going to be incredibly rare, not to mention valuable. 

“One single natural pearl is worth around £3,000, and as the Queen has a three-strand necklace, this could be worth anywhere from £600,000 to £1million.”

It comes as most pearls are cultured in today’s market.