The mihrab and mimber are of delicately carved white marble, and the ebony window shutters are inlaid with ivory and mother-of-pearl.
The Mihrab and mimber are composed of granite tiles.  
mnli hypothesis: The Mihrab and mimber are composed of granite tiles.   premise: The mihrab and mimber are of delicately carved white marble, and the ebony window shutters are inlaid with ivory and mother-of-pearl.