This is an extremely hard, dense wood that is often used for mallets, knife handles, and other tool handles.
In gidgee, curly and fiddelback wood is called "ringed" for some reason.
The wood is coloured green when cut and changes to brown as it dries. When the brown heartwood is exposed to the light it slowly turns purple.
Upon reading the statement direcly above about color, correspondant Warrick Edmonds sent me a note saying
I've used a reasonable amount of gidgee over the last couple of decades, including purple gidgee. Your comment that it cuts green, turns brown and then slowly to purple applies only to purple gidgee, all the other gidgees stay brown, dark brown or brown-red. In my experience, purple gidgee is a washed-out grey-brown (very unattractive) when fresh and over time turns a permanent crimson tinged purple. Iíve read elsewhere than this fades to grey but none of my specimens, which are well over ten years old since cut, have turned grey and appear to be deepening in colour if anything. The colour is on the surface and if you sand or work the wood you will have to wait for the newly exposed material to color up again. Purple gidgee is very hard to come by, rarely for sale. Most of the figured gidgees can be had from specialist suppliers for a price, typically $30 Aust per set of scales thereabouts.
my samples: NOTE: these pics were all taken in very bright incandescent lighting ("soft white" at 2700K) colors will vary under other lighting conditions
both sides of a sample plank of gidgee / Acacia cambagei --- HUGE enlargements are present. This sample was contributed to the site by David Clark whom I thank for this and other contributions to the site. The first side is sanded only to 100 grit but the 2nd side is sanded to an almost glass-like finish with 400 grit. This is a VERY hard, dense wood