This light is just invaluable. It's really the only fossil we have from that time.

I just got real light-headed and dizzy. I jumped — I don't even remember hitting the ground or nothing — and passed out.

He's a go-to guy. That's invaluable.

Just as a fossil is 'petrified time,' so is an ancient artifact or text.

The time I've spent in professional Premiership club rugby has been invaluable.

The more time you can spend in sevens, the better. Time is invaluable; there's no substitute for that.