Granite was quarried in the Mourne Mountains for many years and shipped all round the world. It was used to make paving stones in many cities including London and New York.  Mourne granite is also being used to make the base of the 9/11 memorial in New York.

Assorted Articles:
Mourne Granite

Mourne Granite Company

Web Sites:
Binnian Tunnel - the Reunion Down Under (BBC)

British Memorial Garden - New York

Shaping Mourne granite into kerbstones.

Source: James Valentine (1815-1879) collection

The Mourne Wall - built from 1904 to 1922.

Source:  jamespcullen (flickr)

Source: GOC53's (flickr)

Mourne Observer, 15 February 2006: Granite from Mourne, Northern Ireland, is set to feature in the New York memorial garden for British victims of the 9/11 terror attacks.