You can use 514.5nm laser,  however to minimize the fluorescence/ background from bone tissue and getting better Raman signal, it's always better to use higher wavelength ( e.g. 785 nm).  

Yes, as stated in the question above a 785 nm infrared laser is recomended, also to minimize fluorescence you can use the free Vancouver Raman Algorithm.

Best Regards

http://www.flintbox.com/public/project/1956

FT-Raman spectroscopy using the 1064 nm Nd:YAG laser has been successfully used for the characterization of bone: in some cases fluorescence was almost absent.

http://link.springer.com/article/10.1007/BF00120375