They claim to support them, but won't say how they obtained the diamonds. Was it part of a lease payment on equipment? If so, just say so. If so, they why are they not mining it themselves or do they not have a license to do so in that area?
So if you don't expect it to pay off why risk anything at all? That does not make sense unless you are just trying to gain an advantage using the bigger sucker theory and figure you can buy this junk cheap and pawn it off on naïve investor looking to get rich off those pictures of diamonds. Is that it? Seems to be the only reason this is worth the risk and if so not a very honorable way to make a buck.