The Irish Silica Limestone Building & Walling Stone available from www.wesellstone.com, in Roscrea, Co. Tipperary, Ireland is one of Ireland's hardest & toughest building & walling stones. Hence in the old days of the " Romans" in Ireland it was used as a cobblestone to make roads, which are still there today in towns like Wexford etc. A simple Logical test used by the Romans & Old Artesan Craftsmen in Ireland and of course in the rest of the world was to check the weight of the stone first, hence a stone for example the same size as a pound of butter from the " Cotswolds " in England, is about 1/2 the weight as a piece of Irish Silica Limestone Building & Walling Stone from www.wesellstone.com. That explains why a lot of the " Irish Silica Limestone Building & Walling Stone is purchased by skilled stonemasons in this part of England ( and they know their stone in that part of the world! ). The Irish Silica Limestone Building & Wallling Stone is available in 1. Premium shaped building stone. 2. Random Rubble building & walling stone. 3. Large Corner or Quoin Stones for piers etc. 4. Levellers or shims, to keep the beds level.