Most Expensive Jewelry. New York (CNN Business) Tiffany & Co. just unveiled its newest most-expensive bling ever. "The World's Fair Necklace," unveiled in. Experts think its unusual blue coloring comes from impurities caused by trace amounts of boron atoms.
The presence of boron in trace amounts gives the gem its iconic blue tint. The third most expensive precious metal in the world is gold. Experts think its unusual blue coloring comes from impurities caused by trace amounts of boron atoms.
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The Pink Star Diamond currently holds the record for the most expensive ring ever sold at auction — making it one of the world's most expensive jewelry pieces.
The central stone of the Queen Mother's crown, the Koh-I-Noor diamond is viewed by millions of visitors to the Tower of London each year. It is widely used in several electronics devices and equipment. The Oldest and one of the most respected jewellery companies, Garrard, has made one of the most expensive jewellery pieces in the world: the Heart of the Kingdom.