A real Emerald Necklace can cost anywhere from $200 to over $100,000, depending on the emerald's quality and size. The price also depends on the craftsmanship and setting material, such as gold or platinum. Custom-made designs or classy settings can increase the price. Also, choices such as the necklace's style, brand, and overall craftsmanship change the final price. Generally, the better the quality of the emerald and the setting, the higher the price will be.