Blue iridescent stone center piece in members tank?

I saw a picture shown of a tank on here and I want to say it was a desktop tank. They had a really pretty piece of stone in the front and pretty much center of the tank that was oval shaped and smooth. It was blue iridescent flake looking with darker base color. I wanted to find the same stone and can't for the life of me find the post again on here to see what the name was. The member had the name posted in the comments. Does anyone remember this post?

Good find Betty! Labradorite, I could not remember that in a million years.

Thank you Betty!! DMD you even commented on it too in that post

Yep, it was a cool stone. I could not remember what it was called or whos' tank it was in. Thats what happens when you get old...

I'm even older, DMD.    

I remembered the stone, but couldn't remember the tank or who it belonged to either, so I had to use a couple of searches to find it.

I tried a bunch of searches too and couldn't find it. I could remember it was a male members tank and it was nano and could picture it lol

I missed this thread. You can find them all over on Ebay. The one in my little tank was about $10-$12 if I remember right.

That's where I started looking. I wasn't sure what size to get :/