This is very rare Tiger Iron from Australia.
These pics do not do it justice...In the sun that yellow(tigereye) looks like 24kt gold. It has blues and purples(hematite iron ore) and the red cinnabar is ruby red. cinnabar is whats in thermometers. The cutting edge is 3.5 inch.
I use one of these made with Cocobolo 24/7. Its sitting a couple inches from my hand while posting this.. I use it for about everything.
Being part Iron Ore,quartz its HARD stuff.