Much of the Ciner’s allure can be traced to its origins in fine jewelry. Emanuel Ciner, an Austrian immigrant, founded the firm in Manhattan in 1892, crafting pieces from the traditional precious gems, gold and platinum. But World War I and the Great Depression caused purse strings to tighten and materials to become scarce. Rather than try to weather the economic downturn, which shuttered many other American jewelers, Ciner made the risky transition from fine jewelry to costume (or fashion) jewelry — virtually uncharted territory.