mineral

Tumbled Stones (various)

Mixed Silica-based Minerals (primarily Quartz and Chalcedony)

Hardness: 6.5-7 Mohs; Color: Varied (red, pink, green, yellow, black); Luster: Vitreous to waxy; Structure: Microcrystalline (trigonal); Cleavage: None/Conchoidal fracture.

Hardness: 6
Color: Varied (red, pink, green, yellow, black)
Luster: Vitreous to waxy

Identified May 3, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Varied (red, pink, green, yellow, black); Luster: Vitreous to waxy; Structure: Microcrystalline (trigonal); Cleavage: None/Conchoidal fracture.

Formation & geological history

Formed primarily through hydrothermal processes and volcanic activity where silica-rich fluids cooled and crystallized. These specimens have been mechanically polished in a rock tumbler to create smooth, rounded shapes.

Uses & applications

Used for decorative purposes, meditation, energy healing practices, craft projects, and jewelry such as wire-wrapped pendants.

Geological facts

This assortment includes varieties like Red Jasper, Rose Quartz, Aventurine, and Unakite. The process of tumbling mimics natural river erosion but at a much faster pace using abrasive grits.

Field identification & locations

Identify by hardness (cannot be scratched by a steel blade) and lack of visible crystal faces due to the tumbling process. Common in gift shops and lapidary collections worldwide.

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Nephrite Jade

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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Metamorphic Rock

Green Apatite on Albite

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