Title: The Mystery of the Star Ruby
Description: The Aldens take part in a hunt at a gem mine and discover that someone is out to sabotage the contest.
Subjects: Detective and mystery stories, Brothers and sisters, Orphans, Fiction, Collection and preservation, Precious stones, Juvenile fiction, Mystery and detective stories, Children's fiction, Boxcar children (fictitious characters), fiction, Brothers and sisters, fiction, Orphans, fiction, series:BoxcarChildren, collectionID:Boxcar3, Siblings, fiction