Orange Quartz (or Carnelian Chalcedony)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Igneous (Mixed)
Browse sedimentary and igneous (mixed) specimens identified by the Rock Identifier community.
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Jasper in Calcite / Brecciated Jasper
Silicon dioxide with calcium carbonate (SiO2 with CaCO3)
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz)
sedimentary
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
mineral
Quartz Geode with Calcite/Siderite
Crystalline Silicon Dioxide (SiO2) with Carbonate inclusions
mineral
Tumbled Mineral Collection (Amethyst, Celestite, K2 Jasper, Rose Quartz, Ruby in Zoisite, Que Sera Stone)
Mixed Mineral Specimens (Quartz SiO2, Celestite SrSO4, Corundum Al2O3 with Zoisite, etc.)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Black Onyx
Chalcedony (SiO2)
gemstone
Sandstone with Liesegang Rings
Quartzose Sandstone with Iron Oxide Precipitation
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Weathered fine-grained stone, likely sandstone or quartzite
Quartz-rich sandstone (possibly weakly metamorphosed quartzite); predominantly SiO₂
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Limonite/Hematite Nodules)
Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Mixed Agate and Lapis Lazuli Bracelet
Chalcedony (SiO2) and Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
sedimentary and metamorphic
Rhodonite
Rhodonite, manganese inosilicate — MnSiO₃; the specimen may include quartz, feldspar, and black manganese-oxide minerals in the matrix
mineral
Quartz / Clear Quartz
Silicon Dioxide (SiO2)
mineral
Raw Calcite
Calcium Carbonate (CaCO3)
mineral
Chalcopyrite
CuFeS2 (Copper Iron Sulfide)
mineral
Quartz (Raw Chunk)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3)(OH)3(OH))
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pink Chalcedony
Silicon Dioxide (SiO2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rounded gray stone, likely slate or fine-grained sandstone
Probable slate (low-grade metamorphosed shale) or lithic sandstone; exact identification requires testing
sedimentary
Graphite
Graphite (Carbon, C)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Calcite (with iron oxide staining)
Calcium Carbonate (CaCO3)
mineral
Botryoidal Hematite (included in Quartz/Limonite matrix)
Fe2O3 (Hematite) on Quartz (SiO2) / Limonite
mineral