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Shaw's Iolite Deposit, Spriggs Creek Bore (Spriggs Bore), Ambalindum Station, Harts Range (Harts Ranges; Hartz Range; Hartz Ranges), Central Desert Region, Northern Territory, Australia

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Latitude & Longitude (WGS84): 23° 1' 45'' South , 135° 13' 30'' East
Latitude & Longitude (decimal): -23.0294148761, 135.225084063

To access, take the track south immediately after the Entire Creek crossing on the Plenty Highway. Go 8.7 kilometres south to a low white quartz capped hill. Take the left fork track just before the Inkamulla Creek crossing, and go 7 kilometres. There are several minor creek crossings. You will arrived at a couple of sheds. Continue straight for a short distance to a T junction, turning left, and travel north-east another one kilometre approximately to the site.

There are two areas of diggings 300 metres apart, and a few pits between. Digging is required to find any material.

Iolite is the gem quality variety of cordierite. Iolite is found here in feldspar rich zones in a quartz-feldspar-mica rock. Look for layering of white feldspar with lilac coloured iolite, and continue following this in the hope of uncovering gem quality material. Dry sieving may be useful.

Also found is blue-green kyanite, with crystals up to 15 cms long in very coarse biotite schist lenses. It is unlikely these days material will be found on the surface, and digging will be required. Pink sugary ruby corundum may also be found in brown to black biotite. Also long needle like amphibolite crystals in a light coloured gneiss, in places bearing garnets.

Mineral List

3 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Thompson, D. (ed.) (1986), A Fossicking Guide to the Northern Territory, Northern Territory Geological Survey, Northern Territory Department of Mines and Energy, 2nd ed., 73p, 1986

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