Love these! They were relatively inexpensive (I bought them to outfit about 12 cabinet doors, so I didn't want to spend a lot of money per knob), yet they don't look cheap--even the gold base part, which I worried would look a little brassy and/or lose its color quickly. 

However...after about eight months of use, one of these broke (cracked right through the gem part) for seemingly no reason at all. Huge bummer, because now I have to replace either one or all of them.