The yin yang symbol has been delicately etched onto these round soapstone incense burners in India. These combination burners can be used to burn both incense sticks and cones. Their contemporary styling will compliment the decor of a variety of rooms and tastes. Black soapstone is classified as a soft, black, metamorphic rock. Soapstone is also called steatite or soaprock at times. Metamorphic rocks, such as this one, are formed from one type of rock through a physical change over time.