Mixed (Igneous, Sedimentary, Metamorphic, and Minerals)

Mixed Tumbled Gemstones and River Rocks

Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)

Hardness: ranges from 3 to 7 (Mohs scale); Colors: variety including red, green, blue, brown, white; Luster: vitreous to dull; Crystal structure: mostly Trigonal (Quartz) or Amorphous; Cleavage: none to poor.

Hardness: ranges from 3 to 7 (Mohs scale)
Luster: vitreous to dull

Identified March 20, 2026More mixed (igneous, sedimentary, metamorphic, and minerals) →

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Physical properties

Formation & geological history

Comprising stones from various environments: volcanic deposits, riverbeds, and metamorphic belts. Most polished specimens shown are formed by hydrothermal processes or sedimentary accumulation over millions of years.

Uses & applications

Used primarily for decorative purposes, landscape design, metaphysical healing practices, aquarium substrate, and children's rock collections.

Geological facts

This collection represents a typical 'treasure mix' often sold at museums or gift shops. It contains common varieties like Red Jasper, Sodalite, Tiger's Eye, and various Quartz types alongside unpolished granite and sandstone.

Field identification & locations

Identify in the field by checking for waxy/vitreous luster and lack of metallic streak. These are often found in gravel pits or along riverbanks. Collectors look for unique banding or specific color hues.

Other mixed (igneous, sedimentary, metamorphic, and minerals) specimens

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Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)

Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)

mineral

Mixed Mineral Specimens

Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)

mineral

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic

Greenstone or Epidote-rich rock

Epidote or Chlorite schist/greenstone

metamorphic

Gneiss

Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)

metamorphic

Chrysocolla on Matrix

Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)

mineral