metamorphic
Quartzite Beach Pebble
Quartzite (primarily SiO2)
Hardness: 7 (Mohs scale); Color: White to creamy white with tan/brown iron-stained veining; Luster: Vitreous to dull; Structure: Granular, non-foliated metamorphic; Specific Gravity: 2.6-2.7
- Hardness
- 7 (Mohs scale)
- Color
- White to creamy white with tan/brown iron-stained veining
- Luster
- Vitreous to dull
Identified More metamorphic →
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Physical properties
Hardness: 7 (Mohs scale); Color: White to creamy white with tan/brown iron-stained veining; Luster: Vitreous to dull; Structure: Granular, non-foliated metamorphic; Specific Gravity: 2.6-2.7
Formation & geological history
Formed from the metamorphism of quartz-rich sandstone under intense heat and pressure, followed by natural erosion and smoothing by water (river or ocean) during the Holocene era.
Uses & applications
Used primarily for landscaping, decorative garden stones, aquarium hardscaping, or as worry stones for collectors.
Geological facts
Quartzite is so hard that it will scratch glass. While often white, impurities like iron oxides create the yellowish-brown streaks seen in this specimen.
Field identification & locations
Identify by its hardness (cannot be scratched by a steel knife) and granular, sugary appearance when looked at closely. Commonly found on beaches and in riverbeds worldwide.
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