Is this an all porcelain crown?

[Jennifer4156]

I asked the dentist for an all porcelain crown as I didn't want a metal line to show. I have had the crown on tooth#15 for 6 years now. All of a sudden I can see the metal line. Its hard to see in the pic but much more noticeable in real life and on the other side of the tooth. I was told if the crown is all porcelain you will not ever see a dark line at the top of the gum line. So what exactly do I have? I am going to have to get this crown replaced, so I really need to know what to ask for specifically as asking for an all porcelain crown you can still see the line.

Ps. The dentist is no longer in business, otherwise I would call and ask for a copy of what was done exactly.