Black Jade is an etheric bodyguard and a stone of protection. Its strong elemental energy shields not only the physical body, but guards against negative forces or entities.
The black color comes from both graphite and iron oxide in the stone. It is actually considered to be a very deep green but because of the high iron content, it appears black. This is why when one sees black jade there is often a slightly recognizable green hue. This green hue is seen mostly through any parts of the jade that might be transparent when put in front of light. This transparency is usually found in the edges of the given piece, which seem to glow a very dark green. As these pieces of jade are very black you tend not to be able to see through most of the stone. Natural Black jade is a rare found in today market.