50 - $50 Fluorite is found in ... The reason this mineral is so expensive is that it is only rarely found in larger ...

From Jennifer Lopez's pink engagement ring to Kim Kardashian's 15-carat stunner, read on for a roundup of some of the most expensive celebrity rings of all time.

So, what makes black opal so hard to find? And why is it so expensive? Black opal is one of the most enchanting stones in the world, sought after for its seemingly infinite display of colors.

Size isn’t everything—but the most expensive celebrity engagement rings ... thanks to the mystique surrounding the mega-carat stones. From Jennifer Lopez’s museum-worthy collection to ...