hearth.stone
n.（名词）Stone used in the construction of a hearth.炉石：用来建造壁炉的石头Family life; the home.家庭生活；家A soft stone or composition of pipe clay and pulverized stone used for scouring and whitening hearths or doorsteps.软磨石：一种用来磨面和打磨炉堂或门阶的软石或用陶土及石粉制成的混合物
