This is a hollow form made from Poplar, 3 inches. It has been sanded to 1200 grit, coated with paste wax, and buffed to a satin finish. The color change is the separation of heart wood and sap wood.
Poplar is usually an unpopular wood woodturners normally use it as a waste block. Making a hollow form art piece out of it only proves that woodturners can take the most gnarly, discarded pieces of wood and turn them into pieces of art.
What is a hollow form? I make quite a few turnings that are neither bowls nor vases, so I call them Hollow Forms. They are like a bowl with a return lip that ends in a small hole. I like the challenge of making a smooth, uniform wall thickness form that is deeply undercut.