Viking stone must be another name for a more common named stone, it looks very beautiful and I love the color and texture....I will have to look into that when it comes time to pick rock....the last few days have been heck with my pond constuction, I have a half foot layer of very very dense clay and rock about 6 inches in to the ground and getting machinery into the backyard is impossible so now I have to dig it very slowly and it's taking forever. We thought about using a tiller to loosen up the ground but of course it had to stop working when it was needed most. And wow I could not imagine mowing such a slope with rain that would be very dangerous and very scary, because one slip and those 4 spinning blades will really cause fatal injuries