Stone 9 dragon sculpture.

  I need help identifying this object's stone and value. I purchased at the Scott Antique Mart in Atlanta, Ga. a few years back. What I know... it's a Chinese Emporer's Seal either red jade or Shoushon stone. It weighs 35 pounds and is cold to the touch, it's 9" high by 6" square. It has been inked and used. It's translucent like the pics of red jade I've seen but not milky like the Shoushon stone I've seen. It's carved out of one piece of stone by a very skilled detailed artist, has deep undercuts and a gold engraved signature on the tongue of the largest dragon of 9 dragons. Any geologists out there? Any Chinese artifact experts? I have no history of the statue at all, and the man I bought it from had no clue what it was either.

Help! :)