Gemstone Dragons (#1) Opal’s Time To Shine by Clark

In an enchanted world full of magical creatures, a group of Gemstone Dragons live in Sparkle Cave. Each dragon has a unique gemstone with a magical power! Sometimes their powers get the dragons into trouble, but there’s no problem they can’t overcome by working together.
The Friendship Festival is coming up! Opal has the power of invisibility and prefers to help out behind the scenes. When she’s announced as the festival speaker, she knows that she needs to find someone to take her place. Surely there’s a more deserving Gemstone Dragon! But when a crisis threatens the festival, it’s Opal who comes up with a plan to save the day. Maybe she is the perfect speaker after all . . .
This delightful series is about dragons who learn important lessons through magic, friendship, and teamwork!