Chinese Hard Stone Sutra Book, Qing Dynasty, 19th century

Rare book consisting of eight pages, each engraved on front and back with gilt calligraphy, Buddha figure, dragons and stamps on white hard stone, possibly jade (?), all mounted with silk gold brocade, wooden cover and back also engraved, Qing dynasty,19th century, Chinese
Height of page  23cm  (9 inches)  
Width of page 14.5cm  (5.75 inches) Wide
Depth when folded  5cm  (2 inches)