Including rarity, use, market demand and supply. Black gold, usually called rhodium, is a platinum group metal with very rare chemical properties. In the earth's crust, the content of rhodium is only one billion. Rhodium is usually used to make high-grade jewelry and luxury goods because of its rarity and characteristics. The market price of black gold is usually more than 5,000 pounds per ounce, which is much higher than the price of gold. The value of gold lies in its rarity and wide use.

Gold is widely used in various jewelry, investment and industrial applications. Because of its stability and wide acceptance, gold is considered as a safe-haven asset. The value of black gold and gold has its own merits, and which is more valuable needs to be judged according to market conditions and personal needs.