I don't remember much about the book but I read the book when I was younger and I remember really enjoying it so I would like to find the book to have the chance to read it again. I'll try to add as much information about it as possible.
Things I'm sure of:
- The story involved a girl named Opal
- The story revolved around some sort of gems or stones, I'm not entirely sure the role these gems or stones had but they were very important
- I read the book when I was about 10, so the book came out no later than 2008
- The cover of the book was black or another dark color
- It's a fantasy/adventure book
- hardcover
Other things I think are associated with the book but I could be wrong:
- I believe the character Opal was young, no older than her early teens
- Had no parents? I believe she lived with an old man - possibly her grandfather
- I believe the cover of the book might have had a circle of some sort on the cover? I am really not sure of this
- I believe it is part of a series
I know the book is 100% not any of the following:
- The Prophecy of the Stones
- Deltora quest