Here are some icons I designed for a friend’s website. He asked me to make them at three sizes: 20 pixels wide, 80 pixels wide and 300 pixels wide.
There’s a real skill to designing icons. You have to make them simple enough to be understandable at small sizes but interesting enough to be beautiful when bigger.
I used a well-known aqua or jelly technique for the background. Basically it is a gradient with a series of superimposed arcs to give an impression of translucent 3d shape. The arcs are intersections of two circles, squeeze or stretched slightly where appropriate. I blurred the arcs at the top but at the bottom they remain sharp to give an ultra-modern feel.