| Rock class: | Hypabyssal Igneous Rock |
| Composition: | Potassic feldspar (orthoclase, microcline), quartz, with others. |
| Color: | Light grey, Pink, Red |
| Specific Gravity: | 3 |
| Uses: | Building |
| Comments: | Common on the margins of the Canadian Shield and in the Erzgebirge, Germany. |