Sapphire, Rubies and emeralds are the most desirable precious gemstones, gracing fine jewelry with their timeless beauty. Whether set as-centerpiece in engagement rings, embellishment in necklaces, or accents in earrings, sapphires, rubies and emeralds continue to captivate jewelry enthusiasts worldwide. Sapphires are a variety of mineral corundum, which is made of aluminum oxide and trace amounts of other elements. Sapphires get their colors from trace elements like iron, titanium, and chromium. The value of a sapphire depends on its color, saturation, and tone. They can come in many colors, but the most common color is blue. Sapphires can also be yellow,...