In the Udon Thani province of Thailand, archaeologists have unearthed a cache of ceremonial copper sickles lined with rare azurite pigments. Dating back to the Ban Chiang period, these tools show no signs of agricultural use; instead, chemical analysis revealed traces of aromatic sandalwood and fermented rice, pointing toward their role in the 'Festival of the Copper Moon,' a pre-Buddhist harvest tradition centered on the lunar cycle.
The discovery suggests that early Southeast Asian metalworkers viewed copper not just as a utility but as a sacred conductor for ritual practices. The sickles were found arranged in a circular formation around a central stone pillar, which served as a gnomon to track lunar shadows, highlighting the astronomical precision involved in ancient cultural heritage celebrations.