sedimentary

Bandit Heart Pebble (Quartz-Veined Sedimentary Rock)

Quartz-veined siltstone or sandstone

Hardness: 6-7 on Mohs scale (due to quartz veins), Color: Grayish-brown with lighter quartz bands, Luster: Dull to vitreous on veins, Crystal structure: Microcrystalline quartz in veins and clastic matrix, Cleavage: None distinct, Specific Gravity: 2.65 - 2.75

Identified July 30, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation and lithification of fine-grained sediments (silt or sand) in aquatic environments, subsequently fractured and hydrothermally injected with silica-rich fluids that crystallized into quartz veins, shaped into a heart shape by natural water tumbling and weathering.

Uses & applications

Decorative item, symbolic or sentimental value, collected as a natural curiosity.

Geological facts

Stones naturally weathered into heart shapes are popular finds among beachcombers and hikers, often referred to as 'wishing stones' or 'heart rocks'. The white bands are hydrothermal quartz veins filling ancient fractures in the rock.

Field identification & locations

Found along rivers, lakeshores, and beaches where wave action or stream currents abrade and tumble rocks into smooth pebbles. Easily identified by the contrasting white mineral veins cutting across the weathered gray matrix.

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Sandstone or Siltstone

Arenite (if sandstone)

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Fossiliferous Concretion

Septarian Concretion containing Brachiopods/Crinoids

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Quartz pebble

Silicon dioxide (SiO2)

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Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock

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Banded Siltstone / Mudstone Pebble

Siltstone / Argillite

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Sedimentary Sandstone

Arenite (Sedimentary Rock)

sedimentary