Average to large size ruby’s are just about impossible to find.  Almost every ruby you see now is partially ‘filled’.  Any ruby you might find that is not filled, will likely have a LOT of inclusions, and poor color.  A ruby with good color and clarity is likely in a museum someplace or in the ownership of Harry Winston, Fred, or royalty. The only chance if getting a large ruby would be getting a ruby cabochon (cut).  If it has a ‘star’ on it, then it is known as a ‘Star Ruby’. Cabochon cuts whether it be emerald, sapphires or rubies, can be obtained at a much lower cost because cabochons do not have to be cut from high quality material which is the case with faceted stones.