Copal Resin - Black White Copal Resin Organic black wild white copal , it's Bursera Tree white resin naturally mixed while it is been gathered with tree bark and leaves, this process gives the resin the black color and the variation in the smell and texture. While the white resin is the purest, some conoceurs prefer the black one because it has the rainforest essence and aroma. The Authentic Copal Resin doesnot contain any man made ingredients and doesn't have any special shape , there are some brands or sellers that claim to have the authentic one and it is a mix of watered-down resinous with perfume fixatives that are not natural like the brownish/yellow cheaper copal drops.