Ralph's jaw hardened, his eyes went cold and hard as polished emeralds.

Kirk's jaw hardened, and he smiled a cold, thin smile.

Jarrod's cheeks and jaw hardened with an emotion she couldn't read.

Her jaw hardened, and her dark eyes became very cold.

Austin's jaw hardened, and all traces of warmth vanished from his light blue eyes.

"The girl knows something," he said, his jaw hardening.

Her strong jaw hardened suddenly and she added: 'But take me on and that won't happen.

Matthew's jaw hardened at the thought that suddenly it was good enough now.

"At least the fox has a sporting chance," Ryan said, his jaw hardening.

The earl's jaw hardened, and instead of answering, she found herself wanting to back away.