What Is the Cheapest Rock for Landscaping?

Readers reply: could rocks be conscious? Why are some things conscious and some not?, Life and style

Types of Rocks

Weathering Rocks Scientific American

Where do rocks come from?, Faculty of Sciences, Engineering and Technology

Igneous Rocks, Types of Igneous Rocks

Metamorphic Rocks

igneous rock - Students, Britannica Kids

Please don't stack rocks on your next hike. Here's why. - Lonely Planet

An effective climate change solution may lie in rocks beneath our feet

Rock: Mineral information, data and localities.