![](https://www.nationalrockgarden.com.au/wp-content/themes/nrg-theme/assets/dist/img/lf-pattern-in.png)
![](https://www.nationalrockgarden.com.au/wp-content/themes/nrg-theme/assets/dist/img/lf-pattern-in.png)
Age: 1825 million years, Proterozoic
Location: Mt Bundey Quarry, 120 km SE of Darwin
Formation: A low silica variety of granite, this plutonic rock formed from slowly cooled magma at great depth. This rock features large red crystals of orthoclase feldspar.
Significance: This decorative stone is the red ‘granite’ widely used in Darwin buildings, including the NT Parliament House and Supreme Court.
Donated by: The Government of the Northern Territory and Boral Quarries Mt Bundy
![](https://www.nationalrockgarden.com.au/wp-content/uploads/2022/02/Mount-Goyder-Syenite-NT-Fed-rock.jpg)