Where is Orbicular Jasper found?
Orbicular Jasper (a variety of Chalcedony/Microcrystalline Quartz)
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Open the appOrbicular 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 Orbicular Jasper
Madagascar
Famous for 'Ocean Jasper,' a specific type of Orbicular Jasper found along the northwestern coast. It is known for its vibrant colors and distinct orbicular patterns, often associated with ancient rhyolitic flows.
California, USA
Various localities, including the Mojave Desert, yield Orbicular Jasper, sometimes referred to as 'Poppy Jasper' due to red orbicular patterns.
Mexico
Known for deposits of Orbicular Jasper with diverse colorations and patterns.
Australia
Some regions produce Orbicular Jasper, often with earthy tones.
Egypt
Historically, some forms of jasper with orbicular patterns have been found.
Collecting tips
- Look in Volcanic Terrains. Orbicular Jasper is frequently found in areas with past or present volcanic activity, particularly in association with rhyolite or basalt flows, or in areas with hydrothermal alteration.
- Check Riverbeds and Alluvial Deposits. Water erosion can transport jasper from its source, so riverbeds, gravel bars, and alluvial fans can be good places to find tumbled pieces.
- Examine Outcrops and Veins. Look for silica-rich veins, nodules, or concretions within host rocks. Freshly broken surfaces may reveal the characteristic orbicular patterns.
- Research Local Geology. Consult geological maps and reports for areas known to have chalcedony or jasper deposits, especially those associated with volcanic or hydrothermal activity.
Quick Check
- Color:
- Multi-colored with distinct spherical or eye-like patterns.
- Luster:
- Dull to waxy.
- Streak:
- White (due to its quartz composition).
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