You have two possible choices in this group. If the rock appears shiny, even glassy, and fairly coarse-grained CLICK HERE. If the rock is dense, fine-grained rather dull appearing and perhaps spotted, CLICK HERE.If your sample does not fit the either description Go Back to the previous step.
| COLOR/PROPERTIES | MINERALOGY | |
| Shiny , white, pinkish, light gray | Quartz | (CLICK HERE) |
| Dark gray, green, brown | Quartz, mica | (CLICK HERE) |
| BACK TO STEP 2|
| METAMORPHIC ROCK TEXTURES | METAMORPHIC ROCK CLASSIFICATION |