Hematite
Iron(III) oxide (Fe2O3)
mineral
Category
Igneous Or Sedimentary (Anthropogenic Modification)
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Hematite
Iron(III) oxide (Fe2O3)
mineral
Gneiss
Gneiss
metamorphic
White Quartz Pebbles
Quartz (Silicon Dioxide, SiO2)
Mineral
Carnelian Agate
Carnelian (SiO2 with iron oxide impurities)
mineral
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Fluorite (Blue)
Calcium Fluoride (CaF2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Magnetite or Magnetic Iron Ore
Magnetite (Fe3O4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Amethyst with Marcasite accents
Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Jasper mix)
Cryptocrystalline Sillimanite (Quartz) - SiO2
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Dalmatian Jasper (or Dalmatian Stone)
Dalmatian Stone (A peralkaline felsite composed of feldspar, quartz, and sodic amphibole)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Weathered basalt or mafic volcanic rock
Basalt; typically plagioclase feldspar, clinopyroxene, and often olivine or iron oxides
igneous
Granite
Granite (Phaneritic Igneous Rock)
igneous
Porphyritic Basalt (Chinese Flower Stone / Chrysanthemum Stone basalt variety)
Porphyritic Basalt containing Plagioclase Feldspar phenocrysts
igneous
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Decorative polished pebbles
Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt
mineral
Unidentified weathered rock fragments
Likely mixed silicate rocks; specific identification requires testing
mineral
Ironstone / Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Green Gneiss
Metamorphic Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic