NATUREGUIDEGEMS

https://play.google.com/store/books/details?id=12TwnMj5Kf4C

GROOVY GEMS

https://play.google.com/store/books/details?id=EZx6AgAAQBAJ

Antique Marks Collins gem

https://play.google.com/store/books/details?id=0zcQX6FZb5EC

CRYSTAL,GEM&METAL MAGIC

https://play.google.com/store/books/details?id=Ut5LGMTXR4AC

JEWEL A CELEBRATION OF earth treasures

https://play.google.com/store/books/details?id=lZEBDQAAQBAJ

Rocks,Gems,and Minerals

https://play.google.com/store/books/details?id=82hBBAAAQBAJ

Rocks,Gems,and Minerals

https://play.google.com/store/books/details?id=0ch_CgAAQBAJ