The earliest use of corundum and diamond, in prehistoric China

P. J. Lu, N. Yao, J. F. So, G. E. Harlow, J. F. Lu, G. F. Wang, P. M. Chaikin

    Research output: Contribution to journalArticlepeer-review


    The majority of prehistoric lithic artefacts were fashioned from rocks and minerals no harder than quartz, and there is no prehistoric evidence for the working of harder materials, such as corundum and diamond. The earliest physical evidence for the use of corundum (ruby, sapphire) is thought to be the abrasive grit recovered from Bronze Age Minoan quartz beads (c. 1700-1500 BC), while diamond is thought to have been used no earlier than 500 BC, in India. Here we show that corundum was worked c. 4000-3500 BC during the Neolithic period in China, in the form of polished axes from the Liangzhu and Sanxingcun cultures. We also present physical evidence that later Liangzhu axes (c. 2500 BC), made from the same previously undescribed rock whose most abundant component is corundum, were polished to a mirror-like finish with a diamond abrasive. Our findings, which are the first to support the use of corundum and diamond in a prehistoric context, may also help to explain the trademark feature of the Neolithic in China, vast quantities of finely polished nephrite jade artefacts.

    Original languageEnglish (US)
    Pages (from-to)1-12
    Number of pages12
    Issue number1
    StatePublished - Feb 2005


    • Ancient China
    • Atomic force microscopy
    • Corundum
    • Diamond
    • Electron microprobe
    • Liangzhu
    • Neolithic
    • Polishing
    • Replication experiment
    • Sanxingcun

    ASJC Scopus subject areas

    • History
    • Archaeology


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