A break in the acetabulumâthe socket located on each side of the pelvisâis less common than other types of pelvic or hip fractures. It usually occurs as the result of a car accident or fall from a significant height, with damage to other bones and soft structures in and around the hip and pelvis.
The first and most basic characteristic of all minerals is that they occur naturally. Minerals are not made or influenced by human activity. However, some minerals, such as diamonds, can be manufactured by humans.
Rocks only have 2 characteristics of minerals: solid and form naturally. Minerals must have all 4 characteristics of a mineral. Rocks usually are made of two or more minerals. Two rocks of the same type can have different amounts of minerals.