We found this in the mountains of Southwest Virginia. It is very hard and dense. Any help is appreciated. The second pic is the size of a volleyball. The shiny metallic stuff is fused into large pieces of greenish material. It is also not magnetic!
We have some more information:
1. White silver metallic luster
2. Will not write on paper
3. A knife and hard nails will not scratch it(hardness of at least 5.5)
4. Immersed in hydrogen peroxide, oxygen bubbles are formed
5. Does not give off any odors when rubbed or hammered