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 primarily affects the weight-bearing joints, that is to say, those of the hip, knee and spine. Some non weight-bearing joints, such as those of the fingers and thumb, can also be affected. It is rare for other joints to have lesions due to osteoarthritis, except as a result of trauma (sprain, fracture, etc.) or any unusual stress (repeated sports movements, etc.). Osteoarthritist of the knee (Gonarthrosis)