Known for its high quality , Mintaro slate is produced from what is believed to be the oldest continuing operating quarry in Australia .
The Mintaro district includes prominent Martindale Hall and Kadlunga , two large pastoral properties .
Known for Mintaro 's high quality , Mintaro slate is produced from what is believed to be the oldest continuing operating quarry in Australia .
The Mintaro district includes prominent Martindale Hall and Kadlunga , two large pastoral properties .