I was really pleased to find out that Jade contains calcium. It contains also Iron and magnesium, if it is nephrite. Jadeite is a different kind of jade and contains sodium rich, aluminous pyroxene. Those are the two kinds of Jade. It also comes in many different colours I found out. It's great to have the nephrite one kicking around; so if your short on calcium etc, you can wear the jade instead of buying a calcium supplement. I believe the skin will absorb it.
When I wear the bracelet, which is featured in the picture I immediately start feeling relaxed. I used to wear it and didn't know why I felt so much calmer wearing it. Now I know!