Now with pattern grade scale. To provide a better description of the coins we graded the pattern symmetry on a scale of A,B,C. See 3rd image for a description of what the grading scale means

39.5mm x 3.2mm thick

Super Conductor is a “damascus” type metal formed with copper and Niobium. It is the most premium blank we offer to date. Each coin comes with a plastic capsule.

Laser Engraving advise:

Copper and Niobium offers a unique combination for laser engraving.

Copper needs alot of power and a low frequency setting, while niobium engraves similar to titanium and becomes rough with low freq and high power. I have found a high freq and medium power setting can engrave the niobium cleanly while at the same time leave the copper almost intact. This provides a unique circumstance where the niobium can be engraved to a deeper depth than the copper ( see last picture as an example of this effect.)

Weight: 31 grams