“In today’s specialty coffee world, the most common debris that finds its way into green coffee consists of small stones and small chunks of concrete that are close to the same size and color as a coffee bean. Small bits of wood and insects find their way into the bags as well, but these typically are incinerated during the roast. The bits of stone come from the patios where freshly picked coffee is spread out to dry, then swept up and placed in storage. These vast concrete spaces gradually wear and crumble in the tropical sun and rain, adding little stones to the mix.”
Read the full Daily Coffee News article here.