I am beginning to think Howard is right. The tulipwood I have seen was pinkish to padauk colored and had a very sweet smell (I think thus the name frutescens). The purplish wood I have looks an awful lot like what is advertised at a lot of reputable sites as 'Kingwood' or D. Cearensis.
From http://www.fpl.fs.fed.us/documnts/fplrp/fpl_rp632.pdf:
Quote: Although there are many other tree species of Dalbergia
in Brazil, most of them are not commercially valuable. Alves Camargos et al. (2001) list 15 species, and de Carvalho (1997) lists 13 tree species, plus 26 species that
are lianas or shrubs. The ones that are commercially important include kingwood (D. cearensis Ducke), tulipwood
(D. decipularis Rizzini & A. Mattos; syn. D. aff. frutescens
(Vell.) Britton), and Amazon rosewood (D. spruceana Benth.) (Kribs 1968, Record and Hess 1943). Some are easily identified to species. Dalbergia decipularis is ring-porous and D. cearensis has numerous small (<100 μm) vessels, which make these species distinct from D. nigra and D. spruceana. However, D. nigra and D. spruceana cannot be easily separated on the basis of anatomy. They both have large (>200 μm) vessels, storied rays, and axial parenchyma that is both aliform and in apotracheal bands, as well as other similar macroscopic and microscopic anatomical features.
Side by side the pores are a lot smaller. Now I'm not sure what this dark chocolate wood is with the tiny pores. It is denser than all the rest.
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but the other not, and it was like 
definitely rosewoody smelling though, but more restrained and resembling Indian rw. But the looks were far off Indian. Probably textbook very dark chocolate Braz. 
The smell part doesn't sound good either. Even Madagascar which soemtimes smells like a dirty greased Diesel engine still has the floral quality once you filter the fuel content out 
