Later they learn that the slabs are made of a bright blue gem.

From it he drew a small silver box, its lid set with blue gems.

This was a blue gem the size of his thumbnail.

Do you see that tiny blue gem sparkling in the distance?

The Magician indicated a small blue gem on the table beside him.

The blue and red gems were of a piece, dark but translucent.

In the right pocket he discovered a treasure of sparkling blue gems.

"It's a Yankees sign with red, white and blue gems in it," she says into his microphone.

Her eyes snapped open, locking with beautiful pale blue gems.

The woman who came to the porch had fine blond hair and eyes the color of pale blue gems.