This is a simple Celtic Knot in the form of a double ring (with six points).
STL files created using Steve Abbott's beautiful Knot3D program (http://www.stevenabbott.co.uk/Knots/knots.html).
Next step is a dual colour version...
2x6_Celtic_ring.k3d | 368.0B | |
2x6_Celtic_ring.stl | 5.9MB | |
Celtic_ring_A.stl | 3.0MB | |
Celtic_ring_B.stl | 3.0MB |