Photos by Kent Blechynden. The Dominion Post. -It’s a special art, being able to turn metal into jewellery. Kimberley Rothwell meets the goldsmiths.LOOKING through the microscope on Karl Williams’s workstation is like walking into a vast crystal world. One stone in a ring encrusted with tiny diamonds looks as big as a fist, the minuscule claws that hold it in place are like clutching fingers. Karl is putting stones in where others have fallen out, meticulously inlaying each one with a thin p