Granite is a complex stone, which is why it comes in so many colors. It’s loosely defined as a coarse-grained, quartz-rich, intrusive igneous rock. Auriferous granite often contai… See more

Slate is another stone that can be considered auriferous, depending on the exact formation. In this case, gold ends up deposited in the thin faults and cracks in the slate ov… See more

Basalt is an igneous stone that’s rather common. It often includes incredible minerals, whether it’s from the floors of the Great Lakes or in the Ametista do Sul fields of Norther… See more

A schistis a stone that has schistosity. This property means that by looking at the stone one can easily see the larger grains of minerals with a small magnifying lens but they’re arra… See more