Cover Characteristics: Book Covers featuring Jewels

The first Cover Characteristics post of 2016! And who'd have thought it'd be such a hard one? Book covers with jewels turned out to be so much harder to find than I thought they would be. But, as usual, hunting down the covers is part of the fun, especially since I always end up finding more books to add to my TBR and more free ebooks to download. I'm not a jewelry person myself, but I did manage...