diamond

what does the diamond near our nick name?

I thought you would know.

i didnt pay any but i had diamond....who know about?

i didnt pay any but i had diamond....who know about?

Maybe someone else bought you a premium memership.

Every once in a while chess.com will "gift" a member who has been here for awhile a few weeks of diamond hoping they'll sign up once they see the material.  Anyone of course can get a free trial by providing a credit card #, but this is different.  My advice is to take advantage of it: do some Chess Mentor courses, watch some videos, do some marathon training sessions with the Tactics Trainer.  Your access may not last long.  Or maybe, as zeloplesnivsir suggested,  you have a benefactor?

Here's a way to check.  Run your cursor up to Home in the upper right hand corner and click on Account.  You should see a big yellow box that should tell you when your diamond expires.  Like this:

You have a Diamond Membership, scheduled to renew on December 30, 2015. Thank you for supporting Chess.com! To cancel your Premium Membership, click here.