White Rock Quarry, Horsnell Gully, South Mt Lofty Ranges (Adelaide Hills), Mt Lofty Ranges, South Australia, Australiai
|Regional Level Types|
|White Rock Quarry||Quarry|
|South Mt Lofty Ranges (Adelaide Hills)||Mountain|
|Mt Lofty Ranges||Mountain|
|Latitude & Longitude (WGS84):||34° 55' 31'' South , 138° 42' 30'' East|
|Latitude & Longitude (decimal):||-34.92528,138.70833|
|Köppen climate type:||Csb : Warm-summer Mediterranean climate|
The quarry lies in the Stoneyfell Quartzite Group, which is in turn part of the Adelaide Geosyncline. It is believed, to have formed during the late Proterozoic thru to the end of the Cambrian (approx 900-500 million years ago).
The quarry itself is well known for its large clear crystals of quartz, showing many different forms, from single crystals thru to multiple crystal groups. It is especially well known for its spectacular ‘Japan Law’ twinned specimens. It is also known for producing some of the largest 'totally clear' crystals in Australia.
The South Australian Museum has dedicated an entire display case to the specimens of White Rock Quarry. It is quite surprising and somewhat upsetting to see that we only have 5 specimens currently (as of 6th April, 2012), showing here on Mindat! I know many collectors that have numerous specimens from this locality, all of which are great examples of this locality.
All access and collecting is now prohibited; mainly because of people sneaking into the quarry to collect without permission.
Located 10km east of Adelaide.
Regions containing this locality
|Australian Plate (Australia Plate)||Tectonic Plate|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Detailed Mineral List:
ⓘ Quartz var: Rock Crystal
List of minerals arranged by Strunz 10th Edition classification
|Group 4 - Oxides and Hydroxides|
|ⓘ||var: Rock Crystal||4.DA.05||SiO2|
List of minerals arranged by Dana 8th Edition classification
|Group 75 - TECTOSILICATES Si Tetrahedral Frameworks|
|Si Tetrahedral Frameworks - SiO2 with  coordinated Si|
|Unclassified Minerals, Mixtures, etc.|
|ⓘ||var: Rock Crystal||-||SiO2|
List of minerals for each chemical element
|O||ⓘ Quartz (var: Rock Crystal)||SiO2|
|Si||ⓘ Quartz (var: Rock Crystal)||SiO2|
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
541 - 1000 Ma
|Neoproterozoic sedimentary rocks|
Age: Neoproterozoic (541 - 1000 Ma)
Comments: Adelaide Fold Belt
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
635 - 720 Ma
Age: Cryogenian (635 - 720 Ma)
Stratigraphic Name: Burra Group
Comments: argillaceous detrital sediment; synthesis of multiple published descriptions
Lithology: Argillaceous detrital sediment
Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia).