Olive is very similar to ebony in hardness and tone, opposite though as you have seen in color. It's becoming more common to see it used in the sides, backs, and even tops of acoustic guitars.I'm looking for a lightweight 5-string, and I've almost settled on a custom Frog from Maruszczyk. One of the options for the fretboard is olive. The grain is absolutely beautiful, but I can't find too much information about this wood as far as stability, sound, feel, care, etc.
Anyone have experience with an olive fingerboard?
As far as stability, can't answer that one, but with it's use becoming more widespread I would guess it's pretty stable or guitar builders wouldn't be using it.
The biggest problem I've seen with olive is getting pieces big enough to do anything with because of how twisted the tree grows.
And yes it is a gorgeous wood.