Starfall pendants are typically quite simple designs - but don't let that appearance mislead you. They are also quite ancient and every so often, deceptively powerful. They generally imbue the wearer with some form of simple magic - a blessing, enhancement, or some form of protection. The effect is continuous until the wearer removes the pendant. On some rare occasions, they may gift an ability to the wearer - such as casting a simple spell. In one instance, I came across one that simply functioned as a key for a very specific door.
Among the litter left by The Lost Ones, these are quite ubiquitous and common. However, finding one fully intact and functioning is… somewhat more challenging. Of course, I typically either have several available or am able to locate one for a keen shopper.