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.
But in general, heredity is not a major reason for osteoarthritis. In some people, osteoarthritis may be triggered by another disease, for example, Paget's disease. Although the main cause of osteoarthritis is known to be weakened bone, joint, and muscle metabolism, the precise causal mechanisms are still unknown.