Remarkable Ruby is a gift from the The Stone Prisoner DLC for Dragon Age: Origins. It gives 
(+10) on 
/ (+5) on 
(with diminishing returns) for Shale and (+5) (with diminishing returns) for any other companion.
Acquisition
- Available at Alarith's Store in Denerim Alienage.
- Looted from Ogre Alpha in the Cadash Thaig.