Clonium is available in my Github repository named clonium.
The Clonium Ghost theme is based off of Medium profiles and post pages.
At its core, it is Casper (default Ghost theme) styled differently with a few markup changes.
Some pruning still needs to be done to remove all of the Casper styles that aren't used. I will probably get to that in the future.
Blog covers have not been taken into account yet.
Feel free to use or modify.