CONSTANTINE'S diamond jubilee stone was finally unveiled on Saturday after months of planning.
The eight-tonne piece of granite, known as The Pebble, appeared in the village centre next to the bus stop earlier this year. Since then, the feature has undergone a lengthy transformation.
James Agnew, chairman of the Diamond Jubilee Organising Group, opened the ceremony by giving thanks to all the people who volunteered to make the project possible.
Mr Agnew said: "Before unveiling the stone, Tracey Clowes, the recent curator of Constantine Heritage Centre, traced the fascinating history of Constantine granite, from our ancient fogou, via many important local and national buildings and structures, to the closure of Bosahan Quarry in 1993."
A fogou is an underground, dry-stone structure found on Iron Age or Romano-British defended settlement sites in Cornwall.
"The new diamond jubilee stone incorporates a parish map – which will be the starting point for the planned Granite Trail – plus the certificate of Her Majesty the Queen's Award for Voluntary Service, which was presented to the Constantine Enterprise Company in 2011," added Mr Agnew.
The ceremony concluded with a blessing from the Reverend Stewart Turner.
The stone was made possible through the support of: Constantine Diamond Jubilee committee members, Constantine Parish Council, Cornwall councillor community grants, Constantine Enterprises Company (Calor Villages Award), Tim Marsh from Trenoweth Quarry, John Olds from Bosahan Quarry, David Paton, 20/20 Design, Helen Pascoe, Gavin Saunders, Rhiannon Mann of The Waymarker, Kevin White, James Agnew and Peter Tatham.