I used to know a guy over the internet that dug up the ancient Kauri. It was more known for wild figure. He made a one piece bench to sit on about five feet long. It sat around being used for years but when it sold it sold deep into six figures! The logs are twenty feet deep so basically strip mining for them. It is called 45,000 year old wood but I am skeptical. They called it 45,000 years old twenty years ago, they still call it 45,000 years old. Wouldn't it be 45,020 years old now?
Fantastic ornamental turnings are made from this wood too. Almost any of it calls for deep pockets to buy. The wood isn't petrified so I don't know if weight would be an issue or not.
Hu