Geometry:  Sphere

Page Description
default Test a default Sphere. A simple sphere that tests the default condition. The sphere should be centered at the origin in the local coordinate system with a radius of 1.
extents Test non-default Sphere values. A simple sphere that specifies values other than the default for radius field.
texture A default sphere with a simple imagetexture applied. The texture should cover the entire surface, and wrap counterclockwise from the back of the sphere, beginning should appear upright, and vertically centered on the sphere when viewed from the front.

http://www.web3d.org/x3d/content/examples/ConformanceNist/Geometry/Sphere