sedimentary
Arrowhead made of Moss Agate
Silicon Dioxide (SiO2) with manganese/iron inclusions
AI-generated identification · may be incorrectHardness of 6.5-7 on Mohs scale, waxy to vitreous luster, cryptocrystalline structure, conchoidal fracture, specific gravity of 2.6-2.7.
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Physical properties
Hardness of 6.5-7 on Mohs scale, waxy to vitreous luster, cryptocrystalline structure, conchoidal fracture, specific gravity of 2.6-2.7.
Formation & geological history
Formed from silica-rich groundwater solutions depositing in cavities of volcanic and metamorphic rocks over millions of years.
Uses & applications
Used historically for projectile points and cutting tools, currently collected as artifacts or crafted into decorative jewelry.
Geological facts
Dendritic inclusions resembling moss or ferns are actually mineral oxides of manganese or iron, not plant matter.
Field identification & locations
Identified by its waxy luster, conchoidal fracture, and distinct dendritic patterns; commonly found worldwide in alluvial gravels.
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