But other hard and tough stones were used, such as igneous rocks from Penmaenmawr in North Wales, and similar working areas to Langdale have been found there. Many other locations for production of axes have been suggested (but not always found) across the country including Tievebulliagh in County Antrim, sites in Cornwall, Scotland and the Charnwood Forest in Leicestershire. It is also likely that bluestone axes were exported from the Preseli hills in Pembrokeshire. The industry was also widely developed elsewhere in the world, such as in Australia at Mount William stone axe quarry which used a similar rock until relatively recent times.