Granite
![Picture](/uploads/1/4/0/2/14021357/7021652.jpg)
Some of it's used are making sculptures and monuments. Granite is very hard and tough.
Quartz
![Picture](/uploads/1/4/0/2/14021357/1351555306.jpg)
It is used to make sandpaper. On Mohs hardness scale it is a 7. In the streak test it is colorless.
http://wiki.answers.com/Q/What_are_the_physical_characteristics_of_granite
http://wiki.answers.com/Q/What_is_granite_used_for
http://wpcontent.answcdn.com/wikipedia/commons/thumb/1/14/Quartz,_Tibet.jpg/240px-Quartz,_Tibet.jpg
http://geology.com/minerals/photos/quartz-herkimers.jpg
http://library.thinkquest.org/05aug/00461/images/granite.jpg
http://www.galleries.com/Rose_Quartz/rose_qua.jpg
http://wiki.answers.com/Q/What_is_granite_used_for
http://wpcontent.answcdn.com/wikipedia/commons/thumb/1/14/Quartz,_Tibet.jpg/240px-Quartz,_Tibet.jpg
http://geology.com/minerals/photos/quartz-herkimers.jpg
http://library.thinkquest.org/05aug/00461/images/granite.jpg
http://www.galleries.com/Rose_Quartz/rose_qua.jpg