Hi Adam, it's "Ringed Gidgee", or Acacia cambagei. One of our (many) dry-country acacias. Hard (Janka hardness ~19,000N) and dense (SG 1.1-1.2) and the wild grain makes it a beast to work with, but when you do manage to bully it into shape, it's magnificent, at least the equal of the Dalbergia...