Certainly, one of the most unique lost treasures of all time consists not of gold, silver or precious stones, but of amber – fossilized tree resin – over six tons of it. Dubbed The Eighth Wonder of the World by those who saw it, the Amber Room was one of the most beautiful and luxurious rooms ever built. The cavernous hall consisted of giant wall panels inlaid with over 100,000 pieces of pure, carved amber.