石头的种类及图片

头的种类非常多,以下是一些常见的石头种类及其图片:
1. 大理石:
![marble](https://upload.wikimedia.org/wikipedia/commons/thumb/2/28/Marble_rock.JPG/220px-Marble_rock.JPG)
2. 花岗岩:
![granite](https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Granite_Sierra_Nevada.JPG/220px-Granite_Sierra_Nevada.JPG)
3. 砂岩:
![sandstone](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Sandstone_USGS.jpg/220px-Sandstone_USGS.jpg)
4. 石灰岩:
![limestone](https://upload.wikimedia.org/wikipedia/commons/thumb/5/5b/Limestone.jpg/220px-Limestone.jpg)
5. 石英岩:
![quartzite](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Quartzite.jpg/220px-Quartzite.jpg)
6. 玄武岩:
![basalt](https://upload.wikimedia.org/wikipedia/commons/thumb/8/8e/BasaltUSGOV.jpg/220px-BasaltUSGOV.jpg)