mineral
Quartz (Smoky/Rose Quartz Pebble)
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale. Color: Translucent brownish-pink to tan. Luster: Vitreous to waxy. Fracture: Conchoidal. Crystal system: Trigonal. Specific gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Translucent brownish-pink to tan
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale. Color: Translucent brownish-pink to tan. Luster: Vitreous to waxy. Fracture: Conchoidal. Crystal system: Trigonal. Specific gravity: 2.65.
Formation & geological history
Formed in igneous pegmatites and hydrothermal veins, subsequently weathered and water-worn into a pebble within stream deposits or gravel beds.
Uses & applications
Used primarily for lapidary work, gemstone carving, mineral collecting, and historical gemstone jewelry.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Stream-rounded quartz pebbles often retain internal clarity despite a worn, abraded surface.
Field identification & locations
Identify in the field by its scratch resistance to steel (hardness 7), lack of cleavage, and conchoidal fracture pattern on fresh surfaces. Abundant in gravels and riverbeds worldwide.
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