Where is Mookaite Jasper found?
Siliceous rock (variety of chert/chalcedony)
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Open the appMookaite Jasper occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Mookaite Jasper
Kennedy Range, Western Australia
The primary and most significant source of Mookaite Jasper is the Mooka Creek area within the Kennedy Range of Western Australia. It is found in the weathered profiles of the Windalia Radiolarite formation, often as nodules or lenses within the sedimentary layers.
Collecting tips
- Look for Outcrops and Alluvial Deposits. Mookaite is typically found in weathered outcrops of the Windalia Radiolarite formation or in alluvial deposits (riverbeds, gravels) downstream from these formations. Look for areas with exposed sedimentary layers.
- Identify Color and Pattern. The distinctive vibrant colors (reds, yellows, purples, creams) and often swirled or banded patterns are key identifiers. Unweathered Mookaite will have a waxy to vitreous luster.
- Test Hardness. As a variety of chert/chalcedony, Mookaite will be hard (Mohs 6.5-7). It will scratch glass and steel, but not be scratched by a steel knife.
Quick Check
- Color:
- Red, maroon, yellow, cream, white, purple (often multi-colored)
- Luster:
- Vitreous to dull, waxy when polished
- Streak:
- White
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