Storm glass (Maria V. Snyder)

Synopsis of "Glass Storm", first book of "Glass Series" by Maria V. Snyder: As a glassmaker and a magician-in-training, Opal Cowan understands trial by fire. Someone has sabotaged the Stormdancer clan's glass orbs, killing their most powerful magicians. The Stormdancers—particularly the mysterious and mercurial Kade—require Opal's unique talents to prevent it from happening again. But when the mission goes awry, Opal must tap into a new kind of magic. Yet the further she delves into the intrigue behind the glass and magic, the more distorted things appear. With lives hanging in the balance—including her own—Opal must control her powers…powers that could lead to disaster beyond anything she's ever known.

Untrained. Untested. Unleashed. With her unique magical abilities, Opal has always felt unsure of her place at Sitia’s magic academy. But when the Stormdancer clan needs help, Opal’s knowledge makes her the perfect choice – until the mission goes awry. Pulling her powers in unfamiliar directions, Opal finds herself tapping into a new kind of magic as stunningly potent as it is frightening. Now Opal must deal with plotters out to destroy the Stormdancer clan, as well as a traitor in their midst. With danger and deception rising around her, will Opal’s untested abilities destroy her – or save them all?