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Mookaite

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Colour:
Varicoloured white, cream, brown, grey, yellow, orange-red, purple-red, yellow, mauve
Lustre:
Vitreous
Hardness:
6 - 7
Name:
Named after Mooka Station on which it was found.
The term 'Mookaite' is an unofficial, locally coined name for a silicified porcelanite which forms in the weathering profile of a geological formation known as Windalia Radiolarite (WR), a Lower Cretaceous siltstone that outcrops over much of the Carnarvon Basin in Western Australia.

Mookaite is variously, and incorrectly, described as chert, opalite, chalcedony or combinations of the three.

From a strictly geological perspective however, Mookaite is best defined as a silicified type of Windalia Radiolarite whose silification is opaline to chalcedonic.

[A.McLaren, www.eskimo.com/~knapper/mookaite.htm]

In Featherston et.al. Mookaite is described as being "dominantly massive ultrafine silica".


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Pronounciation of MookaiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of MookaiteHide

Vitreous
Transparency:
Translucent, Opaque
Comment:
Vitreous with patches of matte appearance
Colour:
Varicoloured white, cream, brown, grey, yellow, orange-red, purple-red, yellow, mauve
Comment:
Colouring due to iron oxide/hydroxide granules
Hardness:
6 - 7 on Mohs scale

Synonyms of MookaiteHide

Other Language Names for MookaiteHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MookaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Fetherston, J.M., Stocklmayer, S.M., Stocklmayer, V.C. (2013) Gemstones of Western Australia. Geological Survey of Western Australia, Mineral Resources Bulletin 25, 306p.

Internet Links for MookaiteHide

Localities for MookaiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. β“˜ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Western Australia
    • Carnarvon Shire
Carnarvon Tourist Bureau
Mineral and/or Locality  
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