Mount Gambier is surrounded by pine forests. There are some eucalypt forests as well.
This post on Today I Found Out is about what demarcates the difference between hardwood and softwood.
Apparently the Janka Hardness Test is the common scale for determining the hardness of various types of wood.
It also reveals (in a qualified sort of way) that the hardest wood comes from the Australian Buloke (pronounced “Bull-oak”) tree.
mgpcpastor's blog 