If you've ever wondered how they keep this "pièce de résistance" so shimmering, wonder no more http://on.natgeo.com/2DespOJ

If you've ever wondered how they keep this "pièce de résistance" so shimmering, wonder no more http://on.natgeo.com/2DespOJ 

https://twitter.com/NatGeoTravel/status/952163346308100096