Wands and their cores

[Belle_Starr_777 at yahoo.com]

No: HPFGUIDX 18106

If I'm a bit off, forgive me -- I've been reading HP since the end of 
February.

I've seen wands with 3 types of cores -- unicorn hair, phoenix 
feather and dragon heartstring. Has anything been written about what 
magical properties each of these carry? 

Likewise, can someone direct me to a website that details the 
properites of particular woods that such wands might be made from? 
For example, the benefits and disadvantages of rosewood.

Thanks,
Belle