Blue Speck Creek, Comet Vale, Menzies Shire, Western Australia, Australiai
| Regional Level Types | |
|---|---|
| Blue Speck Creek | Creek |
| Comet Vale | - not defined - |
| Menzies Shire | Shire |
| Western Australia | State |
| Australia | Country |
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Latitude & Longitude (WGS84):
29° 57' 39'' South , 121° 8' 24'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Field geologist J.T. Jackson stated in 1917, the laterite caps in the hills east of Comet Vale contain magnesite, quartz, common opal, chalcedony and plasma - the latter being a leek green coloured form of chalcedony often confused with prase. The laterite in places is chromiferous he states.
E.S. Simpson states he located variably coloured chalcedony east of Comet Vale, as nodules and veins in the laterite. Colours varied from colourless, grey, milky white, yellow and bright green. The green chalcedony as veins 15 to 22 mms wide, coloured by nickel rather than chromium, as a mixture of granular quartz, fibrous chalcedony and opal.
Fetherston et al states good quality chrysoprase is found east of the Happy Jack mine, from the weathering of Walter Williams Formation. The Blue Speck Creek area is 1.5 kilometres south-east of Happy Jack, claimed to show veins of gem quality chrysoprase.
The Mindat co-ordinates are approximate.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Chrysoprase' |
| ⓘ Magnesite Formula: MgCO3 |
| ⓘ Opal Formula: SiO2 · nH2O |
| ⓘ Opal var. Common Opal Formula: SiO2 · nH2O |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Quartz var. Chalcedony Formula: SiO2 |
| ⓘ Quartz var. Plasma Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz var. Chalcedony | 4.DA.05 | SiO2 |
| ⓘ | 4.DA.05 | SiO2 | |
| ⓘ | var. Plasma | 4.DA.05 | SiO2 |
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
| ⓘ | var. Common Opal | 4.DA.10 | SiO2 · nH2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Magnesite | 5.AB.05 | MgCO3 |
| Unclassified | |||
| ⓘ | 'Chrysoprase' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Opal | SiO2 · nH2O |
| H | ⓘ Opal var. Common Opal | SiO2 · nH2O |
| C | Carbon | |
| C | ⓘ Magnesite | MgCO3 |
| O | Oxygen | |
| O | ⓘ Quartz var. Chalcedony | SiO2 |
| O | ⓘ Magnesite | MgCO3 |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Opal var. Common Opal | SiO2 · nH2O |
| O | ⓘ Quartz var. Plasma | SiO2 |
| Mg | Magnesium | |
| Mg | ⓘ Magnesite | MgCO3 |
| Si | Silicon | |
| Si | ⓘ Quartz var. Chalcedony | SiO2 |
| Si | ⓘ Opal | SiO2 · nH2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Opal var. Common Opal | SiO2 · nH2O |
| Si | ⓘ Quartz var. Plasma | SiO2 |
Other Regions, Features and Areas containing this locality
Australia
- Western Australia
- Kambalda Nickel Metallogenic ProvinceGeologic Province
- West Australian ElementCraton
- Yilgarn CratonCraton
Australian PlateTectonic Plate
- West Australian Craton
- Eastern Yilgarn CratonCraton
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