957K views · 4.6K reactions | Why is the mortar black? What do we use to colour it?We use a jet black oxide (dye) to colour the mortar, this makes the wet mortar really dark, and once it dries it is a dark grey colour which matches the stone we’re using. We vary the amount of oxide to alter the colour.#mason #stonemason #stonework #stonewalling #canberra #landscaping #building #construction #australia #cement | Ivey Masonry | Facebook