What is the line that runs through the slate?
The line that runs through the slate is called a ribbon. Ribbon slate is predominantly the most abundant slate in Pennsylvania slate quarries. The ribbon is a natural property in the Slate. It is more dense and harder to cut through because it contains a high amount of carbon. Few people assume that the ribbon line is a weak spot on the quoit board which is false. Ribbon Slate grades out well in the industry and has been known to last 50 to 100 years before deteriorating.
