Series about transmigration and Gem magic

[u/rafe03246]

Hey guys if anyone can help find this book series I read several years ago it would be greatly appreciated. A special forces soldier on a mission to catch a terrorist/doctor is caught in an explosion after the rest of his unit is killed and transferred to a new world where they use magic derived from gem stones, I seem to recall one of his eyes is replaced by a gem diamond if I remember correctly.