Mintaro Slate Quarries

Useful Information

Location: Mintaro.
Open: All year Mon-Fri 7:30-15. Closed on weekends, Public Holidays, Good Friday and Christmas Day. [2004]
Classification: slate quarries, proterozoic siltstones, 900Ma.
Light: n/a
Guided tours:
Address: Mintaro Slate Quarries Pty Ltd, Kadlunga Road, PO Box 8, Mintaro, South Australia 5415, Tel: +61-8-8843-9077, Fax: +61-8-8843-9019. E-mail: contact
As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
Please check rates and details directly with the companies in question if you need more recent info.


1840s Mintaro founded and mining started for local use.
1856 leased by the English settler and stonemason Thompson Priest, who began excavating No. 1 Quarry.
1861 Mintaro was described as being superior to any slate previously known.
1879 Sir Samuel James Way, Chief Justice of South Australia, added the land to his Kadlunga estate.
1888 Thompson Priest died and his quarry was acquired by a Melbourne firm.
1911 Mintaro Slate and Flagstone Company Limited was formed.
1912 an area of 16-24 ha was purchased from Sir Samuel Way.
1978 takeover of the Mintaro Slate and Flagstone Company Limited.
1981 again sold and reformed as Mintaro Slate Quarries Pty Ltd..


Mintaro Slate Quarries are, as the name quarry suggests, open cast mine works for quarrying slate. This is not exactly the topic of this website, which is dedicated to underground locations. But Mintaro Slate Quarries is very important, probably the best slate found on earth, so we thought we should mention this place.

The slate at Mintaro is a natural sedimentary rock, to a metamorphic rock as most other slates. It has an exceptional flatness and straightness even in its hand split form. Other superior properties are durability and slip resistance in dry and wet conditions.