There are lots of types of rock and each type has different properties and uses. For example, some are strong and hard but others are soft and sandy. Some rocks are harder than others. For example ...

To many people, a rock is just a rock. If anyone has been house shopping, you know how realtors will mention that the countertops are "granite" and you might wonder why, from house to house, they all ...

The rocks on Earth are constantly changing due to many different processes. There are three main types of rock, with rocks changing between each type over millions of years. This rock recycling is ...

Although these measures were not all developed for stones, they have been adapted to allow for measurements of fine-grained ...