I just put the finishing touches on a neat custom wedding band for a client of mine in San Fransisco. He sent me this image at left of a Koru. I had to Wikipedia "Koru" to find out what sort of custom ring I would be making, the "Wiki" definition goes like this:
The koru (Māori for "bight"or "loop") is a spiral shape based on the shape of a new unfurling silver fern frond and symbolizing new life, growth, strength and peace. It is an integral symbol in Māori art, carving and tattoos. The circular shape of the koru helps to convey the idea of perpetual movement while the inner coil suggests a return to the point of origin.
After a few emails back and forth of various sketches and designs we settled on the image shown, above at right, and then it was time to get busy making the ring. I made the inner shank from 14k yellow gold, and the outer shank out of 19k white gold (to match his fiances). I used a template printed from the original image he had sent me to trace the Koru onto the 19k stock and pierce out the design with my jewellers saw. After some careful fitting the two bands were in place and I could solder them together. Some filing, sanding and polishing and the ring was complete.