This is a Classic Elite 2 fountain pen, in gold and gunmetal, from Turners Warehouse. The blank is a Diamond Cast called Unicorn Poop, also from TW. With a name like that, I had to buy one! Ended up being very pretty.
Too funny, the name is perfect thoughNicely done!
Funny story... this color exists as a joke. A few years ago I was reaching out to a pen maker about providing material and he asked for a variety of "rich, dark colors... anything but pastel" Well, he got all the rich dark colors he paid for and then I made up an all pastel blank and sent it for free. He ended up calling it Unicorn Poop (which triggered a bit of a war where we'd send each other silly unicorn stuff) and the name stuck. After he did a limited edition run of it I was asked to make it a permanent color... and so I did.