Khair Lakdi (Khadir Lakdi, Acacia catechu) comes from the heartwood and bark of the Cutch tree native to South Asia. It has a dense, reddish-brown texture and is naturally rich in tannins like catechin and catechutannic acid. Commonly used in woodcraft, natural dyeing, and fire rituals, it holds cultural importance as one of the Navagraha timbers. Its distinctive look and composition make it a valued botanical material.