The Aldens take part in a hunt at a gem mine and discover that someone is out to sabotage the contest.

The Alden children are visiting a gem mine that is holding its annual gem-hunting competition. It's not long before Jessie makes a fabulous find. But just when

For use in schools and libraries only. The Aldens take part in a hunt at a gem mine and discover that someone is out to sabotage the contest.

The Alden children find a ruby but it is stolen so they are determined to find out who took it.

Be the detective ! Find the clues, lift the flaps and read the secret facts to solve the Mystery of the Russian Ruby. Solve it once, solve it twice, solve it th