The women’s wearables market is heating up, with plenty of fitness trackers and smart jewelry to choose from—but somehow it’s still hard to find devices that are beautiful, functional, and also reasonably priced. The Bellabeat Leaf Urban, which launches today, hits all three marks. It’s a pebble-like device with a leaf pattern on it (think Elven elegance) and can be worn as a bracelet, a necklace, or a clip. It’s designed to mask the technology…