Top of the Rocks

Clay is a particularly surprising rock. Soft and fragile when dry, it is malleable when in contact with water and can freeze permanently under the action of fire. Thanks to its pec...

Almost unbreakable, this rock constitutes much of the crust of our continents and the root of our mountains. This rock, considered as the base of the terrestrial world, is granite....

There’s a rock that crystallizes the beauty of the world more than any other. It’s sandstone. This rock, rich of the grains of sands that compose it, both porous and resistant, dev...

There’s a peculiarly young rock at the scale of geological times. It comes from the bowels of the Earth and is born from the volcanoes’ fury. This rock is at the root of the most e...

This rock is recognizable by its white color; the great builders have chosen it for their most edifying monuments. But even more surprising, it is born from the living and has main...