Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
sedimentary
Category
Mineral, Often A Rock Given Its Aggregate Nature
Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.
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Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Pumice
Pumicite (fine-grained pumice), Scoria (similar origin but denser and darker, usually basaltic)
Igneous
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Quartzite Cobble / Quartz River Pebble
Silicon Dioxide (SiO2) - Quartzite / Quartz
metamorphic
Jasper
Silicon Dioxide (SiO2), microcrystalline quartz
sedimentary
Blue Goldstone
Goldstone (artificial glass)
Mineral (man-made glass, not natural)
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH))
mineral
Banded Gneiss
Gneiss (pronounced "nice")
metamorphic
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2), Microcrystalline Quartz
sedimentary
Blue Aragonite
Aragonite (Calcium Carbonate, CaCO3)
mineral
Black Tourmaline (Schorl) on Quartz
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Build-A-Bear Plush (Non-Geological)
Polyester fibers (C10H8O4)n and Synthetic Polymers
Anthropogenic / Non-mineral
Quartz Geode Segment
Crystalline Silicon Dioxide (SiO2)
mineral
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Dyed Blue Agate
Silicon Dioxide (SiO2) with artificial cobalt-based dye
mineral
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Chrysocolla (carved)
Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with impurities, microcrystalline quartz
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Chalcedony (specifically Agate or Common Opal variety)
Cryptocrystalline Silica (SiO2)
mineral
Red Jasper (possibly)
Jasper (a variety of Chalcedony, SiO2)
Mineral
Plume Agate or Moss Agate
Silicon dioxide (SiO2)
Mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Sandstone
Arenite (SiO2 principal composition)
sedimentary
Blue Lace Agate (Variety of Chalcedony)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Rose Quartz (SiO₂)
Mineral
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
sedimentary
Copper Ore
Cupriferous Rock / Mixed Mineral Matrix
igneous
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Green Quartz (Prasiolite/Adventurine/Jasper)
Silicon Dioxide (SiO2)
mineral