Also used are jasper (red) and fluorite (blue). The serpentine subgroup (part of the kaolinite-serpentine group) are greenish, brownish, or spotted minerals commonly found in serpentinite rocks. They are used as a source of magnesium and asbestos, and as a decorative stone. The name is thought to come from the greenish color being that of a serpent.
Carrying extra weight causes more stress on the joints. Being obese therefore tends to accelerate the onset of OA. If you have arthritis, you know how difficult it can be to exercise with joint pain. Physical activity is key to weight loss, so having arthritis can make it even more difficult to drop those extra pounds.
Osteoarthritis can be limited to one joint or start in one joint usually the knee, hip, hand, foot or spine or it can involve a number of joints. If the hand is affected, usually many joints of the fingers become arthritic. Osteoarthritis probably does not have a single cause, and, for most people, no cause can be identified. Age is a leading risk factor, because osteoarthritis usually occurs as people get older. However, research suggests that joints do not always deteriorate as people age. Other factors seem to contribute to osteoarthritis.