Treak Cliff Cavern is the only place where you can enjoy practical 'hands on' experience of crafting and working with Blue John Stone at its unique source. You spend time with our crafts people who will explain the tools and equipment you will use to help you create your very own necklace.You have access to skilled people in our on site work shop, doing what they do, using the mineral extracted from the mine you have just visited. This is a very unique opportunity that cannot be experienced anywhere else in the world.