Well, as I said, there is industrial mining, where you have a large kimberlite pipe and you have to - I mean, the investment required to actually bring those diamonds up is quite serious. I think BHP Billiton invested I think 400 billion dollars in the infrastructure required to get diamonds out of the Ekati mine in Canada. So the industrial - the capital investment in some kinds of mining can be very serious, and then at the other end you have artisanal mining. In-between you can have semi-industrial mining. For example, you may know that the diamonds are down ten feet or twelve feet and you would use some heavy equipment to get that up, bulldozers and drag lines and pumps and that kind of thing, but it would not be - you know, the capital investment would not be tremendous. So you have got industrial, semi-industrial and artisanal.