Jasnah- Flesh to Quartz

One fell. Jasnah turned casually, brushing his shoulder with her fingers as he struggled to his knees. He became crystal, a figure of pure, flawless quartz—his clothing transformed along with him. The diamond in Jasnah’s Soulcaster faded, but there was still plenty of Stormlight left to send rainbow sparkles through the transformed corpse.

The Way of Kings Chapter 36