Mooralla, Southern Grampians Shire, Victoria, Australiai
Regional Level Types | |
---|---|
Mooralla | - not defined - |
Southern Grampians Shire | Shire |
Victoria | State |
Australia | Country |
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Latitude & Longitude (WGS84):
37° 20' 49'' South , 142° 3' 4'' East
Latitude & Longitude (decimal):
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Hamilton | 10,104 (2017) | 44.2km |
Mindat Locality ID:
206
Long-form identifier:
mindat:1:2:206:5
GUID (UUID V4):
73bd02c4-2eda-4a95-adf1-1c2c87d2fd90
Since the 1960s smoky quartz 'geodes' have been highly sought after from the designated gem collecting site near Mooralla, near the Grampians in western Victoria. The geodes are formed below the surface in weathered greenish-grey rhyolite, known as the Rocklands Rhyolite, which erupted in the Late Devonian period. Decades of collecting have resulted in a landscape of low dumps, partly filled in pits and holes as deep as six metres in an area where good specimens were once recovered from close to the surface.
The predominantly smoky quartz crystals, very dark brown to black in colour, are noted for their transparency and lustre, and often contain wispy swirls and gas bubbles in fluid inclusions. They are found as simple to complex crystals or groups of crystals up to three or four centimetres across and loose crystals, weathered out of the rhyolite, are common. Most valued are spherical geodes up to 10 centimetres across, with one or more crystals attached to the inside walls of the geode.
The inside walls of the geodes are often lined with small opaque and colourless quartz crystals up to a few millimetres long, and sometimes amethystine to pink or lilac quartz of similar size.
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Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities5 valid minerals.
Rock Types Recorded
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Rock list contains entries from the region specified including sub-localities
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Alphabetical List Tree DiagramDetailed Mineral List:
β Goethite Formula: Ξ±-Fe3+O(OH) References: |
β Hematite Formula: Fe2O3 References: |
β Pyrite Formula: FeS2 References: |
β Quartz Formula: SiO2 Localities: References: |
β Quartz var. Agate References: |
β Quartz var. Amethyst Formula: SiO2 Localities: References: |
β Quartz var. Chalcedony Formula: SiO2 References: |
β Quartz var. Smoky Quartz Formula: SiO2 Localities: References: |
β Siderite Formula: FeCO3 References: |
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
β | Goethite | 4.00. | Ξ±-Fe3+O(OH) |
β | Hematite | 4.CB.05 | Fe2O3 |
β | Quartz var. Agate | 4.DA.05 | SiO2 |
β | var. Amethyst | 4.DA.05 | SiO2 |
β | var. Chalcedony | 4.DA.05 | SiO2 |
β | 4.DA.05 | SiO2 | |
β | var. Smoky Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
β | Siderite | 5.AB.05 | FeCO3 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Goethite | Ξ±-Fe3+O(OH) |
C | Carbon | |
C | β Siderite | FeCO3 |
O | Oxygen | |
O | β Quartz var. Amethyst | SiO2 |
O | β Quartz var. Chalcedony | SiO2 |
O | β Goethite | Ξ±-Fe3+O(OH) |
O | β Hematite | Fe2O3 |
O | β Quartz | SiO2 |
O | β Siderite | FeCO3 |
O | β Quartz var. Smoky Quartz | SiO2 |
Si | Silicon | |
Si | β Quartz var. Amethyst | SiO2 |
Si | β Quartz var. Chalcedony | SiO2 |
Si | β Quartz | SiO2 |
Si | β Quartz var. Smoky Quartz | SiO2 |
S | Sulfur | |
S | β Pyrite | FeS2 |
Fe | Iron | |
Fe | β Goethite | Ξ±-Fe3+O(OH) |
Fe | β Hematite | Fe2O3 |
Fe | β Pyrite | FeS2 |
Fe | β Siderite | FeCO3 |
Localities in this Region
- Victoria
- Southern Grampians Shire
- Mooralla
- Southern Grampians Shire
Other Regions, Features and Areas containing this locality
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Mooralla, Southern Grampians Shire, Victoria, Australia