CAN'T-MISS COLLECTION Color Corrections After 40 years on the market, Lagos’ iconic Caviar Color gemstone collection is getting a youthful boost. Now featuring bezel-set gems and one sugarloaf-cut cabochon gemstone a year (for 2016 it’s amethyst), the addition “gives our Caviar gemstone portfolio a modern update,” says designer Steven Lagos. Besides the plentiful purple stone, the collection comprises Rose de France, blue and white topaz, and green quartz. Retail prices start at $395.  Above: Earrings in silver with 7.6 cts. t.w. colorless rock crystal quartz, $695, station necklace in silver with 27.36 cts. t.w. blue topaz, $1,500; inset: bracelet in silver with 18k gold and 11.17 ct. sugarloaf-cut amethyst; $1,350; Lagos, Philadelphia; 877-925-4305; lagos.com   HOT STOCK TIP Shape Shifters Julie Lamb’s Metropolis collection offers