It is a jade or glass or resin or something sililar Figure of a Dragon. It appears to give a hollow sound when tapped It is 21 inches Long and 15 inches High. It weighs about 20lbs.
Your dragon is indeed made of glass in a mould. It is made in China in recent times and has, unfortunately only decorative value. My estimation is based on what I believe a asian art lover would pay for it in a sale or auction.