Did they solicit you or did you app for it? If they solicited you did it say pre-selected, pre-approved, or pre-qualified? Just curious because the sent me a pre-selected solicitation and I as a bit tempted to try, but it did not appear to have any rewards, it just seemed to have a prestige aspect of it because of the name. oooh Diamond, but no rewards? It did not appear so much of a desire for me to get it. I only want rewards cards now. You do have a lot of credit and your scores are lower than mine. 
Oh wait I did have baddies on there last year, so I guess I shouldn't really complain too much. I also did not work it as well as I could have.
Awesome!
July 2013 score: EQ FICO 819, TU08 778, EX "806 lender pull 07/26/2013
Goal Score: All Scores 760+, Newest goal 800+
Take the myFICO Fitness Challenge
Current scores after adding $81K in CLs and 2 new cars since July 2013
EQ:809 TU 777 EX 790 Now it's just garden time!
June 2017 update: All scores over 820, just pure gardening now.
I knew you could do it!! Congrats to you!!!
That's a really nice card for BT or spreading out payments on large purchases. Enjoy your new card, and congrats!!!
Current Scores: EQ 775 (03/04/2014), EX 756 (03/01/2014), TU 760 (03/01/2014)
Ruby Spade Garden Club Member - Last App: 03/04/2013 - No apps until 2014
Cards: Cap1 Venture 6.4k, Cap1 Quicksilver MC 1.75k, BankAmericard 1-2-3 Visa Signature - UCF Alumni Association 5k, Discover 7k, Citi Diamond Preferred MC 10.35k, Wells Fargo Rewards Visa 7k, Chase Freedom 5k, Chase Ink 7.5k, Amex Green NPSL, Dillard's Amex 7.5k, JC Penney 7.5k, Kay Jeweler's 5.1k
Congrats!
Nice going, enjoy! 
Starting Score: EQ 717 EX 724 TU 736