2018-11-15 · Maso Quarry is a leading supplier of quarry material in Ghana. We operate one of the largest quarries in the country. The quarry is located at Nsawam in the Eastern Region of Ghana. We produce aggregates (crushed rock, quarry dust and gravel) and Cement Blocks. Our principal markets are in Accra, Aburi, Tema, Nsawam, Suhum, Koforidua and Nkawkaw.