Cinnamomum Zeylanicum is a tree indigenous to Sri Lanka which produces the highest-grade pure cinnamon. Sri Lanka is the world's largest producer and exporter of pure cinnamon to the world and pure Ceylon Cinnamon Suppliers from Sri Lanka claim 90% of global market share. Cinnamon grown and produced in Sri Lanka has acquired long standing reputation in the international market due to its unique quality, colour, flavour and aroma. Ceylon Cinnamon is categorised into four major grades - Alba, Continental, Mexican and Hamburg based on the diameter of the quill, where the most expensive (Alba) has a 6 mm diameter quill.