Bible Encyclopedias
Altar Stone (or Slab)

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

Altar Stone (Or Slab),

that stone which should be without spot or blemish, and consequently entire, which forms the upper and chief part of a Christian altar. In the Church of England, the law requires that the lower portion of the altar be of wood. At Westminster Abbey, and in hundreds of other churches, the slab is found of stone or marble.