multiple

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 Cobble

Quartzite (primarily SiO2)

metamorphic

Lapis Lazuli (Tumbled Specimen)

Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

metamorphic

Jasper

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

sedimentary

Hag Stone

Perforated Flint or Chert (SiO2)

sedimentary

Lapis Lazuli (in Matrix)

Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

metamorphic