Magic Gems #2: Lost in the Crystal Caves by Payal Doshi (author)

Dragon Girls meets Love Puppies in this new chapter book series starring a group of friends who protect animals with their magical gemstones!
Rio, an Earth Gem, is eager to earn his first gemstone in order to do more for his animal neighbors. One afternoon, a fox bounds up to Rio, clearly in distress. Another fox is lost inside the nearby Crystal Caves!
Without waiting for his fellow Gems, Rio heads into the caves. Once inside, finding a lost fox proves trickier than Rio thought it would be. He’s worried he might get lost himself!