Diamonds the precious gemstones forms after billions of years and are found at about 150km deep in the earth.
They are formed naturally at high pressures and temperature above 1000 degrees centigrade.
Now researchers say that diamonds can now be made and artificially at room temperatures in a laboratory.
The investigators at the Australian National University and the RMIT University in Melbourne, Australian say they did it by subjecting Carbon to intense heat.
They say so far they have succeeded in making two types of diamonds at room temperatures using high pressure.
They also say that their diamonds are like the natural ones and even stronger.
Diamonds part from being gemstones used as jewellery are used in cutting hard materials like glass.