**update 10/21/2014**
I still think the overall quality of this ring is great, the problem is that the celtic knot design wore off after about 4 months of regular wear. You might want to check into designs that are actually etched into the tungsten for more durability.

I have now purchased 2 tungsten carbide rings from Metal Masters and am extremely pleased with the quality of work.  The first ring i purchased was a faceted 8 mm ring that caught my eye because it was so inexpensive. When I received the ring, I was pleasantly surprised by the heft, quality of the work, and the durability of the ring - This ring looks and feels like a ring that is much, much more expensive.  The same goes for the celtic ring - it's beautifully crafted, hefty, and it will last forever. Who needs to spend several thousand dollars on a ring that you have to protect against scratches, bends, dings, etc.  Cobalt is nearly indestructible, ridiculously hard to scratch (the "scratch" that you might see on this material is more likely scraped off residue from a softer metal that wipes off easily) and it retains it's luster forever.  Tungsten is the new gold!