I think what Hazard meant was that real diamonds aren't actually worth squat but you're free to pay for them what you want and many people indeed do. DMD was delisted from Cryptsy... Probably a good idea to stay away for the time being at least (although if you feel like gambling there may be some cheap DMD relative to recent prices should Cryptsy relist it).
About as worth it as real world diamonds, if you know what I mean.
I don't know whether it will ever be worth as real world diamonds, but it used to be priced at around 1 cent (in USD fiat) and it's now at 80, even after correcting after the recent frenzy in all cryptos. That's not a bad gain at all!
Hopefully with the recent takeover, it'll be able to establish itself as a serious alt competitor. Then, it'll be worth many dollars (or BTC!) soon.