Goldsmiths Jewel HD is an interesting Windows Phone puzzle game where you are tasked with collecting an assortment of jewels while avoiding non-precious stones.
The game, available for low-memory devices, seems to rely more on luck than skill though. You collect the gems by initiating a line that bounces around the screen. When the line hits a jewel (or stone) they fall to the bottom of the screen and are considered "collected".
Goldsmiths Jewels HD does have a certain amount of appeal and does grow on you slightly.