Something that has been on my mind a little as I think about bluestone. Is it soft or hard? It's often described as forbidding, gothic, dark and awe-inducing, but I've also read a few things about its attractiveness as a walking and tactile surface because it is soft. Think of all those rounded edges in all those laneways, and our (Melbourney) familiarity with its rippled edges on the foundations of so many buildings, or on the edges of our kerbs as we cross the road.
It's a stone that's hard to carve -- though I need to find out more about this from a sculptor. But what do we mean when we say a stone is soft?