Layng in his bed crosslegged Benjamin Stone looked worried, while holding in his hand a red stone and mumbling from time to time, the red stone was only a little bigger than a thumb but it was a deep red as a freshly pluked rose, it had weird looking veins inside it looking like it was cracked but its surface was smooth like it was just polished .
Longest sentence award^ Maybe add a few periods?
You have a ton of people giving you power stones, be more confident. I had only read that part. add Grammarly to your app. it will aid you as it found a word that was misused in your intro. =]
This is not a review I just glanced it.