The Basics of a Ceramic Chiminea Clay is the most commonly used material used to create chimineas. Think of terracotta pots, or red pottery. Clay is strong and hard, but it can crack if handled improperly. Clay is very absorbent, so it needs to be protected by sand and gravel https://fireplace13444.onesmablog.com/15-funny-people-who-are-secretly-working-in-chiminea-fire-pit-70238437