Gran Perla Granite Material v0.1 by WASasquatch
This surface shader is designed to match the the look and feel of Gran Perla granite. A type of granite primarily made up of Quartz, Feldspar, Horneblende, and Biolite, with a small percentage of Mica.
This has been designed at relatively real-world scales, and is best viewed somewhat close or it will begin diffusing and looking like normal stone, as granite does.
The only downside to this is reflections from Mic will be few and far between as I am not able to figure out how to get the reflection I want. I spent hours at it, maybe someone else can help.