Brazilian Rosewood has been used for a long time as the wood of choice for guitar backs.  Due to intensive harvesting for many decades, the Brazilian government and international treaty banned export of this wood in 1991, in order to allow the remaining forests to recover.  Our wood below comes from the stumps of the trees cut before 1991, which is legal for export. 

 

Afzelia Burl
 
Ziricote
 

Cochinchin burl
 

Boxwood
 

More Wood Types Are Available