→ back RED BROWNS Most common Australian hardwoods come in shades of reds and browns. There is a variety of Ironbark species which include these characteristics plus species such as Red Gum, Jarrah, Bloodwood or Spotted Gum. YELLOWS Species of Australian Hardwood that show lighter more yellowish shades tend to be either Tallowwood, Blackbutt or White mahogany. Both carry the strength and durability of typical Aussie hardwoods, but tend to have a softer, lighter look. When oiled, the woods beautiful grains are brilliantly displayed, giving each piece its own unique look. Timbers are commonly measured in three different categories: density, hardness, and durabilty. Density is measured in kg/m3 at 12% moisture content. Hardness is quantified using the Janka Rating Scale, which measures the force required to embed an 11.28mm steel ball into wood to half the ball's diameter at 12% moisture content (measured in kilonewtons). Durability is measured using the Natural Durabilit