'You don't step into the ring with Ali because you think you can box.
The Clan is the original unit of social organization for the people of The Known World. Humanti society is becoming more diverse. The Guild or professional organization is taking the fore in the Known World. Except on the Sea.
A new substance is found in an out of the way area and kept very quiet. It is found to make a perfect counterfeit diamond. Only the most expert of expert appraisers would even have a hope of noticing that it is fake. Only one problem: if it gets wet it starts to slime and if it is saturated, it turns into a glob of gel.