The Coffin Stone is a large sarsen

Sarsen

Sarsen stones are sandstone blocks found in quantity in the United Kingdom on Salisbury Plain, the Marlborough Downs, in Kent, and in smaller quantities in Berkshire, Essex, Oxfordshire, Dorset and Hampshire...

 stone at the foot of Blue Bell Hill

Blue Bell Hill

Blue Bell Hill is a chalk hill between Maidstone and Rochester in the English county of Kent. It overlooks the River Medway and is part of the North Downs. Settlements on the hill include Walderslade; and Blue Bell Hill and Kit's Coty villages...

 near Aylesford

Aylesford

Aylesford is a village and civil parish on the River Medway in Kent, 4 miles NW of Maidstone in England.Originally a small riverside settlement, the old village comprises around 60 houses, many of which were formerly shops. One pub, a Post Office and four small independent shops remain...

 in the English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 county of Kent

Kent

Kent is a county in southeast England, and is one of the home counties. It borders East Sussex, Surrey and Greater London and has a defined boundary with Essex in the middle of the Thames Estuary. The ceremonial county boundaries of Kent include the shire county of Kent and the unitary borough of...

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The stone is one of the Medway megaliths

Medway megaliths

The Medway megaliths or Medway tombs are names given to a group of Neolithic chambered long barrows and other megaliths located in the lower valley of the River Medway in the English county of Kent...

 lying 400 m west of the Countless Stones

Countless Stones

The Countless Stones, also known as Little Kit's Coty House, is the name of the remains of a Neolithic chambered long barrow on Blue Bell Hill near Aylesford in the English county of Kent. The site is one of the Medway megaliths...

 (Little Kit Coty's House). It is a rectangular stone lying flat and measuring 4.4 m long and 2.8 m wide. Two much smaller stones lie nearby.

In 1836 local farmers found 'a sack of bones' underneath the stone, the only record of this is written, the bones are not able to be located and all other evidence is presumed destroyed. It is possibly the remains of a chambered long barrow

Chambered long barrow

Chambered long barrows are a type of megalithic burial monument found in the British Isles in the Neolithic.Long barrows either contained wooden or stone burial structures beneath the barrow and the surviving megalithic stone in the latter means that they are the ones referred to by archaeologists...

, further archaeological excavation was carried out in the summer of 2008 and the evidence did not suggest this, but was inconclusive.

The field is currently being planted as a vineyard and it is planned to allow public access as part of this.