They say one person's trash is another's treasure, but a chunk of 'rock' used to keep a door open for decades is a treasure by almost anyone's standards.

A woman discovered the 3.5-kilogram (7.7-pound) stone in a stream bed in southeast Romania, brought it home, and used it as a doorstop.

Her find turned out to be one of the biggest intact chunks of amber in the world, according to a report by El Pais . Its value? Somewhere in the region of €1 million – around US$1.1 million.

Amber is tree resin from millions of years in the past . Over time, the highly viscous substance fossilizes into a hard, warm-hued material widely recognized as a gemstone.

In Romania , pieces of amber can be found around the village of Colti in sandstone from the banks of the River Buzau, where it has

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