Nephrite Jade Sphere This is a highly polished Nephrite Jade Sphere. It has extremely strong protective, Guardian energy You should carry such a stone at all times when outside your home. Photo is typical. SOURCE: Peru - SIZE: Large, 50-60 mm. Approximate weight is 242 grams. Jade is a talisman of personal protection and one of the joy of nature. It is a powerful guardian of your loved ones and your physical security. The magnetite in these stones provides extra protection. This stone will bring you the blessings and protections of many Goddesses. You should always carry a small piece in your pocket when outside your home.