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Mariah Carey 's emerald and diamond necklace will make you "Obsessed" ... but, you'll need to dole out big money if you're hoping to gift it this holiday season.

The impressive piece gained international recognition when the singer-songwriter wore it during her Christmas Holiday Special. Gallery Launch Gallery GWS Auctions

The necklace is made from 18K gold with dozens of diamonds running in a circle around the long loop, which once circled Mariah's neck.

The centerpiece contains three massive Colombian emeralds ... carrying a combined weight of nearly 60 carats. The diamonds are 55 carats on their own ... so, this necklace isn't for the faint of heart or the weak of neck!

That might be a bit of an exaggeration, since the 16.5-inch-long piece actually weighs

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