metamorphic
Quartzite Arrowhead (Archaeological Lithic)
Recrystallized Quartz (SiO2)
Hardness: 7 (Mohs scale), Color: Creamy white to pale green, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline), Cleavage: None (Conchoidal to irregular fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Creamy white to pale green, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline), Cleavage: None (Conchoidal to irregular fracture), Specific Gravity: 2.65
Formation & geological history
Formed through the regional metamorphism of quartz-rich sandstone. This specific specimen has been anthropogenically modified (knapped) into a projectile point, likely during a prehistoric period (Archaic to Woodland periods, approx. 1,000 to 5,000 years old).
Uses & applications
Originally used as a projectile point for hunting. Today, it serves as a historical artifact for archaeological study and private collection.
Geological facts
Quartzite was a popular material for lithic tools in regions where high-quality flint or chert was scarce. Because quartzite is very hard and lacks the predictable cleavage of flint, it required significant skill to shape into tools.
Field identification & locations
Identify by looking for 'flake scars' or 'pressure flaking' along the edges, which indicate human crafting rather than natural erosion. Found across North and South America in riverbeds and fields. Note: Removal of artifacts from public lands is illegal in many jurisdictions.
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