Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Igneous, Sedimentary, Metamorphic, Mineral
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon dioxide (SiO2)
mineral
River Rock (likely Gneiss or Quartzite)
Metamorphic rock specimen (potentially Foliated Gneiss)
metamorphic
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Muscovite Mica
Muscovite: KAl2(AlSi3O10)(OH)2
mineral
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Raw Corundum (Sapphire/Ruby variant)
Aluminum oxide (Al2O3)
mineral
Almandine Garnet
Fe3Al2(SiO4)3
gemstone
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Mixed Mineral Bead Bracelet
Polycrystalline and Monocrystalline Silicates/Oxides (Quartz, Howlite, Hematite)
gemstone
Sapphire in a ring
Corundum (Al2O3)
mineral
Dumortierite Quartz
Dumortierite-bearing Quartz (SiO2 with Al7BO3(SiO4)3O3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (SiO₂)
Mineral
Leopardite
Quartz porphyry / Quartz monzonite with manganese oxide spots
igneous
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Mixed Mineral Collection (with Titanium Aura Quartz)
Silicon Dioxide (SiO2) with metallic coatings and various silicates
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Citrine or Yellow Quartz
Quartz (SiO2) with iron impurities
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Gneissic Granite)
Gneiss
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium impurities
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Mixed collection of common river stones
Varied lithologies, visibly including quartz-rich rock, dark mafic rock, sandstone, and purple quartz-bearing material
igneous, sedimentary, metamorphic
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral