This is a hollow form made from Poplar, 4 inches. It has been sanded to 1200 grit, coated with a paste wax, and buffed to a satin finish.
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. The streak of color is caused by a bug or beetle, probably an Ambrosia Beetle, traveling along in the wood.
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 hollow form that is deeply undercut.