Soapstone Wikipedia
Locally quarried soapstone was used for gravemarkers in 19th century northeast Georgia, US, around Dlonega, and Cleveland, as simple field stone and "slot and tab" tombs. Small blocks of soapstone (8" x 10" x 1") were heated on the cookstove or near the fire and used to warm cold bedclothes or to keep hands and feet cozy while sleighing.