Extrusive rocks cool during a volcanic eruption ... and small amounts of olivine (dark green) and amphibole. Pink colored granite is a result of an abundance of potassium feldspar within the ...

but actually New Hampshire's rocky foundation is less than half granite. What are those other rocks? And how did they get there? For answers we turn to Granite Geek David Brooks. He's a reporter ...

Although it was abandoned nearly a century ago after sending its pink granite near and far, visitors can walk through the quarry and see piles of rocks with chisel marks on them where the stone ...

Is quartz more durable than granite? All of these questions will be answered below and lead into interesting discussions on the formation of igneous rocks ... few brown and pink specs.