Diamond star and what to make of it

This morning I stumbled upon an article about star BPM 37093 (a.k.a. "Lucy", more on that later) a star 50 light years from our little mudball that is, apparently, built around a giant carbon-based crystallized core. This pretty much makes it one gigantic diamond of sort. This was actually part of the plot of "Count to a Trillion" by sci-fi writer John C. Wright, based on the white dwarf core crystallization theory that has been around since the '60s.
This immediately reminded me of one of the entries in CF's Blogger series where the main character dived into Jupiter's atmosphere and discovered a massive diamond inside.

Now the big question is: what would a superwoman do with a diamond the size of a moon?

argonaut wrote: F. Scott Fitzgerald's story "The Diamond as Big as the Ritz" is about a mountain-sized diamond somewhere in Montana (I think) and the man who's been keeping it secret while growing rich from it. And in one of Lord Dunsany's stories (I forget the title), Jorkens tells of the time he came upon an enormous diamond meteorite in the Siberian forest, only to lose it when a spring thaw softens the frozen ground and it sinks out of sight.

That last one sound like some girl in space had lost one of her bests.