mineral

Quartz (Beach Pebble)

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: Milky white to translucent; Luster: Vitreous/Waxy (when water-worn); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: Milky white to translucent
Luster: Vitreous/Waxy (when water-worn)

Identified April 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal processes in veins or within igneous rocks like granite. This specific specimen has been eroded and shaped into a smooth pebble by glacial transport and wave action on a beach.

Uses & applications

Industrial uses include glassmaking, electronics, and abrasives. In this form, it is used for decorative landscaping, jewelry (as tumbled stones), and as a sentimental collector's item.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Heart-shaped rocks like this are often referred to as 'Lover's Stones' or 'Pocket Hearts' by beachcombers.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and resistance to chemical weathering. This smooth, rounded texture is typical of stones found in high-energy coastal environments.