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Mixed Tumbled Stones Collection

Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)

Hardness: varies (mostly 6-7 Mohs); Color: multicolored (blue, white, red, black, purple, pink); Luster: vitreous to waxy; Texture: smooth, polished, or raw; Crystal Structure: various (trigonal, monoclinic, etc.)

Hardness: varies (mostly 6-7 Mohs)
Color: multicolored (blue, white, red, black, purple, pink)
Luster: vitreous to waxy

Identified April 26, 2026More multiple →

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Physical properties

Formation & geological history

A variety of formation processes including volcanic (obsidian, basalt), metamorphic (marble), and sedimentary (howlite, desert rose). Most are sourced from decorative rock tumblers or mined commercially.

Uses & applications

Used for decoration, crystal healing, collection, and educational kits. Some higher-quality stones like soda-lite or quartz are used in jewelry.

Geological facts

This collection contains several distinct minerals: 'Desert Rose' (selenite/gypsum), Howlite (white with grey veins), Sodalite (blue with white streaks), Rose Quartz (pink), and dyed Howlite (bright blue/purple).

Field identification & locations

Identify in the field by color and hardness; for example, quartz cannot be scratched by steel. These are commonly sold in 'rock shop' fill-a-bag bins or science kits.

Other multiple specimens

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Piddock bored rock (likely Mudstone or Shale)

Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock

sedimentary

Quartzite Pebble

Quartzite (SiO2)

metamorphic

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Red Jasper

Chalcedony (SiO2) with iron inclusions

sedimentary

Quartzite Cobble

Quartzite (primarily SiO2)

metamorphic

Jasper

Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)

sedimentary