This pendant and chain weighs 12 grams gross weight.
A Gem and Pearl Laboratory report No. 06941, 3rd January 2013, confirm the jade to be genuine.
There is glue between upper back of jade and metal mount.
We are unable to test the white metal.
The rear of case features two screws, so that you can open the case and remove the jade. These screws are missing their nuts or fasteners.