I'd also say it's some sort of rosewood. There are dozens of rosewood species. If it's old, it might be Brazilian (dalbergia nigra), but it's likely something else. Brazilian rosewood is almost extinct and the prices for it have skyrocketed.
If it has a sweet smell when cut, it's probably a rosewood. It's hard to tell when it's covered in wax. A good test would be to see if it floats in water. If it sinks, it narrows your possibilities.