The most expensive chess in the world is known as Jewel Royale Chess Set ::: Commissioned by Boodles, a custom jewelry company from Britain. Made form gold and platinum, the chess set also uses precious stones like diamonds, rubies, pearls and sapphires. The king piece alone uses 146 diamonds and 73 rubies studded in 165.2 grams of 18 carat gold. Priced at about US$9.8 million, this is certainly the most expensive chess set.
