mineral
Quartz Pebble (Quartzite / Vein Quartz)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on the Mohs scale; Color: milky white to grayish-translucent with slight iron staining; Luster: vitreous to dull/waxy due to tumbling; Cleavage: none (conchoidal to uneven fracture); Specific gravity: ~2.65.
- Hardness
- 7 on the Mohs scale
- Color
- milky white to grayish-translucent with slight iron staining
- Luster
- vitreous to dull/waxy due to tumbling
Identified More mineral →
Explore Quartz Pebble (Quartzite / Vein Quartz) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on the Mohs scale; Color: milky white to grayish-translucent with slight iron staining; Luster: vitreous to dull/waxy due to tumbling; Cleavage: none (conchoidal to uneven fracture); Specific gravity: ~2.65.
Formation & geological history
Formed either as hydrothermal vein deposits or through the metamorphism of quartz sandstone (quartzite), subsequently weathered, eroded, and rounded by fluvial or marine water action.
Uses & applications
Commonly used in landscaping, gravel aggregates, decorative rock gardens, and historically for flintknapping or tool-making.
Geological facts
Quartz is one of the most resistant minerals on Earth, which is why it often survives long transport in rivers and oceans to form durable, smooth pebbles while other softer minerals break down into silt and clay.
Field identification & locations
Identifiable by its ability to readily scratch glass and steel, lack of cleavage, milky to slightly translucent appearance, and rounded, water-worn texture. Extremely abundant worldwide along riverbeds, beaches, and glacial deposits.
