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.
The properties of minerals include crystal shape (habit), luster, color, streak, tenacity, hardness, cleavage, fracture, and density or specific gravity. in addition, a number of special physical and chemical properties (taste, smell, eleasticity, feel, magnetism, double refraction, and chemical reaction to hydrochloric acid) are useful in identifying certain minerals. each mineral has a unique set of properties that can be used for identification