The Altar stone is a central megalith at Stonehenge in England, dating to Stonehnege phase 3i, around 2600 BC. It is made of green micaceous sandstone and originated from a quarry in Wales. It weighs six-tons and would have been twice the height of the bluestones at the site. Now recumbent, it may have stood as a single large monolith Megalithic tomb, Mane Braz, Brittany A megalith is a large stone which has been used to construct a structure or monument either alone or with other stones. ... Stonehenge Stonehenge is a Neolithic and Bronze Age monument located near Amesbury in the English county of Wiltshire, about 8 miles (13 km) northwest of Salisbury. ... Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location within the UK Official language English de facto Capital London de facto Largest city London Area - Total Ranked 1st UK 130,395 km² Population - Total (mid-2004) - Density Ranked 1st UK 50. ... Red Sandstone in Wyoming Sandstone is an arenaceous sedimentary rock composed mainly of feldspar and quartz and varies in colour (in a similar way to sand), through grey, yellow, red, and white. ... National motto: Cymru am byth (Welsh: Wales for ever) Waless location within the UK Official languages English, Welsh Capital Cardiff Largest city Cardiff First Minister Rhodri Morgan Area  - Total Ranked 3rd UK 20,779 km² Population  - Total (2001)  - Density Ranked 3rd UK 2,903,085 140/km² Ethnicity: 97. ... Bluestone is a name given to a form of dolerite which appears blue when wet or freshly broken. ...