How does a melted diamond look like?

When a diamond is melted, it typically transforms into a carbon vapor or liquid state rather than becoming a recognizable molten form like metals. The extreme temperatures required to melt diamond (over 3,500 degrees Celsius or about 6,332 degrees Fahrenheit) cause it to break down chemically, often resulting in a blackened, amorphous carbon residue rather than a shiny, liquid state. As a result, melted diamond doesn't retain its crystalline structure or appearance.