Diamond (DMD) is a decentralised, open-source cryptocurrency launched in July 2014. As a hybrid proof-of-work/proof-of-stake coin, it combines various interesting aspects of other popular cryptocurrency projects, including Bitcoin, Litecoin, Novacoin, Luckycoin (random block feature) and Florincoin (support for transaction comments). Other features include very low transaction fees, steady coin supply at one diamond per block for eight years, and a limited number of total coins capped at just 4.38 million.
Source; https://bit.diamonds