Longpi Oil Burner | Black ClayHand moulded oil burner for essential oils, with a small opening below for a tea light. Longpi pottery is an age old technique unique to just two villages in north east India. Made by mixing ground black stone with locally found clay, longpi pieces are characterised by a deep black patina, and the burnished finish creates a natural protective seal. Being handmade, each will vary slightly in shape and size. Simply place a few drops of essential oils in