Oh, Henry!After a tumultuous several years including bankruptcy in 2009 and losing the right in 2010 to use his own business name to Sandawana Holdings Ltd. (the buyer of his intellectual property), Henry Dunay, “the father of the American school of ­jewelry design,” is back in the design seat at his own HDD Inc. in New York City.Since 2010, he’s been quietly crafting one-offs for private clients and retailers. Dunay recently created a suite of pink topaz pieces for Somewhere in the Rainbow in Scottsdale, Ariz., a hands-on educational agency that maintains an extensive gem and jewelry collection. “We are all about collecting fine gemstones and having great designers make iconic pieces for the collection,” explains curator and manager Shelly Sergent. “It’s almost impossible to have a modern and contemporary jewelry collection without Henry Dunay.”For his part, Dunay says