Sandstone
Arenite (SiO2 primarily)
sedimentary
Category
Sedimentary Or Mineral
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Gneiss with Quartz Veining
Gneiss (High-grade metamorphic rock)
metamorphic
Ferruginous Quartz
Ferruginous Quartz (Silicon Dioxide + Iron Oxide, SiO2 + Fe2O3)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Dalmation Stone
Dalmation Jasper (Igneous microcrystalline quartz with arfvedsonite)
igneous
Honeycomb Calcite
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Laterite
Laterite (Ferricrete / Alcrete)
sedimentary
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone (with potential Concretion or Fossil fragment)
Arenite (primarily SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Blue Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Halite
Halite (NaCl)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose Sandstone / Feldspathic Sandstone)
SiO2 with minor impurities (Fe2O3, KAlSi3O8)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Tumbled Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Hematite
Iron (III) Oxide (Fe2O3)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite in Quartzite/Graphite Matrix
Iron Sulfide (FeS2)
Mineral
Satin Spar (Gypsum variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Black Obsidian and Hematite
Volcanic Glass (SiO2) and Hematite (Fe2O3)
igneous and mineral
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Kyanite
Kyanite (Al2SiO5)
mineral
Pyrite and Chalcopyrite in Fluorite Matrix
Calcium Fluoride (CaF2) with Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral