Hi Debby,

As far as I know, the $25 chips with a diamond in them were only available as past of a $1, $5 and $25 set. They had serial numbered sets and unnumbered sets. They also had numbered and unnumbered sets without the diamond. I don't know what year they were made. They are a totally different design from what could be called a Black Diamond $25 house chip, but even their house chip was only a 500 chip issue. At one point or another, I've owned all four different sets. I took one of the $25 w/diamond chips to a jeweler to take a look at. It was a real diamond. ...industrial grade, but real.

Bob in Omaha