Step 1: Modeling - Band
First, choose a front plane to sketch on and draw a circle using sketch tools.
Select the circle and choose the Boss-Extrude tool under Features and click okay.
Draw another smaller circle (depending on your ring size) from the center of your first one and check the Cut-Extrude option.
Step 2: Modeling - Mount With Six Claws
Once completed, select the Revolve tool under Features.
Next select the top face of the mount and and check Shell under Features.
Select the top of the mount again and sketch 6 circles on top of it. Go back to the Features and select Cut-Extrude to cut out the six claws.
Select edges of each claw one by one and use the Chamfer Feature.
Step 3: Modeling - Gemstone
Mine came out a little bit too small so I added additional layer on the outside.
Step 4: Modeling - Final Touches
You can select parts by faces or by edges to round up desired areas.
Choose the radius of the fillet appropriate to your taste.
Step 5: Adding Materials
Next just click Add Material to the part. Remember that your part needs to be selected/ highlighted in order to do it.
You can also pick the material first and drop it onto the part.
Step 6: Rendering
I hope this will help some of you to create your own custom rings for yourself or for your Valentines!