Diamond trading involves the buying and selling of diamonds, which are precious gemstones valued for their beauty and rarity. Traders typically source diamonds from mines or suppliers and then sell them to retailers or directly to consumers. The value of a diamond is determined by the Four Cs: carat weight, cut, color, and clarity. In the trading process, diamonds are often graded and certified by professional organizations to ensure quality and authenticity. This certification helps buyers make informed decisions and can significantly impact a diamond's market price. Overall, diamond trading is a complex industry influenced by supply, demand, and market trends.