This tutorial was derived from Toby's Paint Shop Pro 9 Easy Glass Orb tutorial. It was made using Macromedia Fireworks 8, and shows the steps needed to create a glass orb.

Select the fill again, and on the white fill select the triangle above the color that’s black, and click it. Slide the slider to 0. Click outside the canvas, and then re-click the line, and apply a filter of blur > Gaussian... and slide the radius to 15. And then you can produce this: