Pyrite
Iron Disulfide (FeS2)
Category
Browse metamorphic, likely sedimentary with quartz veins specimens identified by the Rock Identifier community.
Pyrite
Iron Disulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide + Fe2O3 / FeO(OH))
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
Yellow Quartzite River Cobble
Meta-quartzite (SiO2 with iron oxide staining)
Quartz Pebble (with Iron Inclusions)
Silicon Dioxide (SiO2)
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
Weathered Sandstone with Algae Growth
Arenite
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
Blue Calcite
Calcium Carbonate (CaCO3)
Tree Agate
Silicon Dioxide (SiO2) with Chlorite/Manganese inclusions
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Drupa Quartz (Sparkly Drusy Quartz on Matrix)
Crystalline Silicon Dioxide (SiO2) on host rock
Milky Quartz
Silicon Dioxide (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Quartzite
Quartzite (primarily SiO2)
Red Jasper (Brecchiated Jasper)
Silicon Dioxide (SiO2) with Hematite impurities
Calcite
Calcium Carbonate (CaCO3)
Pyrite
Iron Disulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Sandstone (likely River-tumbled Picture Sandstone)
Arenite (predominantly SiO2 with iron oxide impurities)
Rhodonite, Gray Moonstone, and White Feldspar Mix
Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
Gold
Native Gold (Au)
Tiger Iron / Banded Iron Formation
Banded Iron Formation (SiO2 with Fe2O3 and FeOOH)
Amazonite
Microcline (variety Amazonite), K(AlSi3O8)
Milky Quartz
Silicon Dioxide (SiO2)
Blue Quartz (potentially Dumortierite-included)
Silicon Dioxide (SiO2) with inclusions
Quartz (Milk Quartz Cobble)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Crystalline Quartz
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Dragon Blood Jasper
Epidote-containing Quartz and Chlorite (SiO2 + (Ca2(Al, Fe)3(SiO4)3(OH)))
Green Aventurine
Aventurine (Silicon dioxide, SiO₂)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Soapstone (Talc-Schist)
Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)
Yellow Jasper
Silicon Dioxide (SiO2) - variety Jasper
Marble
Metamorphosed Limestone (main mineral: Calcite, CaCO3)