metamorphic
Quartzite Lithic Fragment (Possible Arrowhead Tip / Flaked Tool Fragment)
Metamorphic Quartzite (SiO2)
Hardness: 7 on Mohs scale; Color: Translucent brownish-orange to reddish-pink; Luster: Vitreous to greasy; Texture: Fine-grained to granular (sugary surface texture); Fracture: Conchoidal to uneven, showing delicate pressure flaking along the edges.
- Hardness
- 7 on Mohs scale
- Color
- Translucent brownish-orange to reddish-pink
- Luster
- Vitreous to greasy
Identified More metamorphic →
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Physical properties
Hardness: 7 on Mohs scale; Color: Translucent brownish-orange to reddish-pink; Luster: Vitreous to greasy; Texture: Fine-grained to granular (sugary surface texture); Fracture: Conchoidal to uneven, showing delicate pressure flaking along the edges.
Formation & geological history
Formed through the regional or contact metamorphism of quartz-rich sandstone under extreme heat and pressure. The sharp edges and flaked shape indicate it was knapped or worked by humans into a projectile point or stone tool fragment.
Uses & applications
Historically used by indigenous peoples for projectile points (arrowheads/spear tips), scrapers, and blades. Modern value is primarily historical, archaeological, or as a field find for collectors.
Geological facts
Quartzite is extremely tough and durable because individual quartz grains recrystallize and interlock tightly during metamorphism. Because it breaks across grains rather than around them, high-quality fine-grained quartzite can be flaked similarly to chert or flint.
Field identification & locations
Look for a sugary texture combined with conchoidal fracture scars and fine secondary flaking along the margins. Commonly found in riverbeds, eroded banks, and archaeological surface scatters where quartz-rich metamorphic rocks occur.
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