Highly reflective corundum axe from the Liangzhu culture dating back to 2500BC. According to Peter Lu et al. proof of the earliest use of diamond abrasive. Extracted from: http://www.peterlu.org/sites/peterlu.org/files/Archaeometry_47_1_2005.pdf
Highly reflective corundum axe from the Liangzhu culture dating back to 2500BC. According to Peter Lu et al. proof of the earliest use of diamond abrasive. Extracted from: http://www.peterlu.org/sites/peterlu.org/files/Archaeometry_47_1_2005.pdf