Measures from .590 - .600 inches or 19/32 on an inch. This marble is in near mint condition. I love this color combination on corkscrew marbles. There is something about the orange
and black I find appealing. The orange base is slightly translucent and changes to almost white just before the black color comes in. Maybe this could be considered a tri-color, you decide. This marble has a glossy, wet finish with a couple of micro pin pricks. As you can see in the photos, it is a nice looking marble.