Bois de Rose is a rosewood, most commonly from Madagascar, but it's not Madagascan Rosewood (Dalbergia Baronii/Dalbergia Madagascariensis). Bois de Rose is much darker, with more red tones.
It's probably a long shot, but there might be someone with firsthand experience of using it as a tone wood or touchboard. That it may closely resemble Brazilian Rosewood was also something that I'd read, which is the wood it will, potentially, be replacing.