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.
After 50, the impact of osteoarthritis can worsen due to accumulated use and the wearing down of cartilage that occurs with age. Osteoarthritis of the knee causes pain, limited range of motion, stiffness of the knee, swelling of the joint, tenderness, deformity and weakness. Causes of osteoarthritis include age, weight, genetics, previous injuries, infections, and illness (such as a tumor or gout).