Here, i want to show how to make a beautiful glass balls in Photoshop. it can be used in many fields specially if you are a graphic designer. it is simple and doesn't need high designing knowledge.

Step 1: Drow the Basic Shapes

All the complicated shapes includes these three basic : circle, triangle and square. So, start with a circle. Choose your favorite color and size.
To make this circle become a sphere, you should add lighting effect.
Go to Filter > Render > Lighting effects and do the adjustments like the pictures.

Step 2: Adding Reflects Inside the Ball

Adding some light reflects make the ball more transparent.
Draw another circle right on the top. In the layers set the "Fill" of this layer to 10%. Now, change the dimensions using ctrl+T botton and set it like the pictures. Duplicate this layer to made another circle. Put it to the right or left of your shape.

Step 3: Adding Window Reflection

To make the window , make 4 squares with Rectangle tool. Now merge the layers of the window. Rotate it and make to to appropriate shape by using Wrap tool.
Drag the window to your ball and change the color to white and the Opacity to 60%.

Step 4: Adding Shadow Under the Ball

There are many ways to add shadows in Photoshop. I use this method :
-Draw an oval under the ball
-Drag it to the middle of your ball
-Right-click on the layer and choose Blending option
-Check the drop shadow box and make the adjustments as shown on the picture