OK this has become a bit of a mystery. Due to mainly the resin veins and it deep colour. I have put it around a few people here and the answers are mixed and varied.
When you have resinous Burrs with a rich colour as this one has there are many species that produce very similar looking burls and it becomes hard pin point origin. So usually have to look at all aspect of the Burr ie outer skin, sap thickness colour what apart of the country and so on.
So the suggestions to date are as follows:- Resinous Eucalyptus Burl from Tasmania, Redgum, Gray gum , plus your own suggestions although I doubt very much Salmon Gum. The Eucalyptus trees can all produce something like this and they are generally soft to turn and very porous. Given also that we have around 300 species of Eucalyptus as well, it does become a bit of a challenge.
Often we buy or obtain burls from the actually collector and the location can play a large part in the ID. But then there no real clear definition of burls here ie I have been told there is no Brown Mallee only white or red, well all my Mallee is most assuredly brown in colour and my coloured vision is perfect. This I know as its been tested several times, so go figure.
So at the end of the day you can call it what you want
Eucalypti Mysterium Silva Australis a fairly common timber here burls are rich in colour, variegated by resin veins. Attractive and easy to turn with a striking appearance when finished in either matt or gloss.
