Captivated by the sundry beauties of the natural world, the jewelry artist Wallace Chan translates his very personal vision of nature into compositions of gemstones and metal. The Eyes of Infinity necklace, which features removable scorpion pins of rubies and demantoid garnets, exem­plifies Chan’s imaginative approach to setting layers of stones in a complex formation that lies gracefully on the neck. At the center of this lightweight gold-and-titanium design is a rare 45.51-carat cat’s-eye&nbsp…