Storm glass
(Book)

"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. As she delves into the intrigue behind the mysterious glass orbs, she uncovers secrets not even she could anticipate. 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."--,Amazon.com