London, June 24 (IANS): The Islamic State (IS) terror group has posted on the social media pictures of a series of gold coins which it claimed were the long awaited currency of the radical group, media reported.

The coins were a series of gold sovereigns bearing IS inscriptions. The group claimed that one gold coin was worth $139, a report in the London-based Telegraph on Wednesday said adding that the terror group has begun minting its own "Islamic Dinar" coins.

The group announced in last November that it would start minting its own currency in areas under its control, in an effort to "emancipate itself from the satanic global economic system".

The currency, based on the original dinar coins used during the Caliphate of Usman -- a companion of Prophet Mohammad -- in 634 CE, was set to include seven minted coins: two gold, three silver and two copper.

Designs due to be embossed on the gold coins included a symbol of seven wheat stalks, a Quranic reference, and a world map.

Earlier, a couple of similar images of gold coins were passed around by IS supporters on networking sites.