Thursday, May 19, 2005

Diamonds in ancient China...

A group of Chinese-US team of scientists have discovered new evidence stating that stone age craftsmen in China used diamonds to polish jade objects 2000 years before anyone else had. Peter Lu and colleagues from Harvard University studied four ceremonial burial axes, about 4500 years old. Scientists say that quartz alone would not have been able to achieve such lustrous finishes.

For research, the scientist took a small stone sample from one of the axes and subjected it to polishing with diamond, alumina, silica, etc and did varied experiements. No matter what modern techniques they used, they team couldnt achieve a surface as flat and smooth as of the axe. They concluded that the use of corundum could have slashed production times and diamond could have added the finishing touches.

Stone Age Axe

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