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.
Most people over age 60 have osteoarthritis to some degree, but its severity varies. Even people in their 20s and 30s can get osteoarthritis, although there is often an underlying reason, such as joint injury or repetitive joint stress from overuse. In people over age 50, more women than men have osteoarthritis.