Before the non-descript rock was split, it looked a lot like a gray egg. But once broken in half, the rock is revealed to contain blue quartz crystals that look a lot like a very happy Cookie Monster.

Smoky quartz, is a type of rock with colors ranging from smoky gray to brown. Picture the misty shades you see in a forest on a foggy morning – that’s what it looks like. People believe it has ...

A rock recently discovered in Brazil could fetch more than $10,000 -- because it bears an uncanny resemblance to "Sesame Street's" Cookie Monster, according to reports. It’s worth a lot of cookies.

In the far, northwestern corner of Oklahoma's Panhandle, you can find Black Mesa State Park and Black Mesa Nature Preserve.

The rock has now made its way from Brazil to California and lies in the hands of a big Cookie Monster fan, who also happens to be a gemologist. Lucas Fassari shows off his Cookie Monster rock in ...

If you're redoing your kitchen, maybe you are looking into the vintage trend that's making a comeback, or putting in some old-school kitchen lighting. If a big kitchen renovation project is in your ...

From afar, alabaster sheets of quartz can look like bright cobwebs weaving through rock. Gold-bearing quartz veins are found in parts of the crust that have undergone a lot of stress and strain ...

If you see a rock that is 100% white, it is not granite but more likely a man-made rock that is created to look like granite or a quartz countertop. Black Granite Black 'granite' (Credit: Granix.com) ...

Amethyst, for example – which you might not realize counts as quartz, but definitely does – owes its purple hue to the presence of iron, irradiated by gamma rays from the rock surrounding the gem.

But if you turn over a white rock like quartz or marble in practically any desert on earth, you’ll see something that looks like this: Credit ... Meanwhile, colonies of cyanobacteria that live under ...

Lucas Fassari found the unusual rock in November in the Brazil region of Rio Grande do Sul, according to American geologist Mike Bowers, the current owner of the rock. Bowers posted information on ...