igneous, sedimentary, metamorphic, and mineral
Mixed Quartz and River Pebbles (Stone Collection)
Mixed assortment containing mainly Silicon Dioxide (SiO2)
Hardness: 5-7 (Mohs); Color: Varied (white, pink, grey, brown, green); Luster: Vitreous to dull; Crystal structure: Mainly trigonal; Cleavage: None/Conchoidal
- Hardness
- 5-7 (Mohs)
- Color
- Varied (white, pink, grey, brown, green)
- Luster
- Vitreous to dull
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Physical properties
Hardness: 5-7 (Mohs); Color: Varied (white, pink, grey, brown, green); Luster: Vitreous to dull; Crystal structure: Mainly trigonal; Cleavage: None/Conchoidal
Formation & geological history
An assortment of polished, tumbled, and raw specimens. Many are silicates formed in magma cooling or metamorphic events, later weathered in rivers or processed in rock tumblers.
Uses & applications
Decorative accents, educational hobbyist collections, garden decor, and alternative healing (crystal collecting).
Geological facts
This collection includes Amethyst (purple quartz), Rose Quartz (pink), Tiger's Eye, Aventurine (green), and Granite. Some stones appear to be 'craft store' tumbled stones mixed with natural river rock and a piece of fossiliferous limestone or coquina.
Field identification & locations
Identify by checking hardness (quartz will scratch glass) and looking for distinct colors. Common in glacial till, riverbeds, and as commercially sold decorative mixes.
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Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)
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Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Igneous/Sedimentary/Metamorphic with Mineral Vein
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
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Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
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Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Magnetite
Magnetite (Fe3O4)
mineral