Where is Mookaite Jasper found?
Silica (SiO2)
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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
Mooka Creek, Kennedy Range, Western Australia
The sole known commercial source of Mookaite Jasper. It is found in shallow, weathered outcrops and alluvial deposits within the Mooka Creek area, approximately 160 kilometers inland from the coastal town of Carnarvon.
Collecting tips
- Geological Context. Mookaite is found in specific geological settings related to ancient marine sediments. Understanding the local stratigraphy of the Kennedy Range, particularly the Windalia Radiolarite, is crucial for identifying potential deposits.
- Color and Pattern Recognition. Look for the characteristic vibrant reds, yellows, purples, and creams, often in swirled or banded patterns. The unique color combinations are a primary identifier.
- Hardness Test. As a form of chert, Mookaite will scratch glass and steel (Mohs hardness 6.5-7). This helps differentiate it from softer minerals or artificial materials.
- Fracture Type. Observe the fracture. Mookaite, like other cherts, exhibits a conchoidal (shell-like) fracture when broken, producing smooth, curved surfaces.
- Specific Gravity. While not a field test, a specific gravity of 2.58-2.62 g/cm³ can help confirm identification in a laboratory setting.
Quick Check
- Color:
- Red, yellow, purple, cream, brown (often multi-colored)
- Luster:
- Vitreous to waxy
- Streak:
- White
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