Marble a fine kind of lime-stone, (a carbonate of lime;) it is found in extensive masses in most parts of the world. It occurs in beds in granite, gneiss, etc, rarely in secondary rocks, but is found in all the great ranges of primitive rocks in Europe. Its hard, compact texture, semi-transparency and lustre, when polished, has made it a great favourite in architecture and house building. The finer kinds, especially those used by the statuary are chiefly obtained from Italy; but there are a great variety of beautiful marbles in Great Britain and Ireland. See Jamesons Mineralogy, Vol. II, For an improved method of sawing marble and other hard stone, see Sawing. An artificial marble is frequently made from plaster of Paris, quicklime, salt, ox-blood, pieces of glass, and stones of different colours. These are beaten to an impalpable powder, and mixed up to the consistency of paste with beer or milk. When thoroughly dried in the form which is intended to be given to it, it is rubbed with sand paper and polished with emery and oil.

Mr. Wilson's process for making artificial stone chimney pieces, is described under the article Stone.