Ghost Ship Anchor
The Ghost Ship Anchor is a decorative item classified as a Traditional Minor Artifact. It can potentially be obtained via the sole method of killing Leviathans. These creatures are seldom come across, and - assuming they give any artifacts at all - are far more likely to give items more easily obtained by other methods. Therefore the anchor (as well as the Seahorse Statuette) are considered extremely rare and valuable, despite being decorative only.
Comes in various colours.