Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Category
Mineral Health
Browse mineral health specimens identified by the Rock Identifier community.
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Ferruginous Sandstone
Sandstone with Iron Oxide (Limonite/Goethite)
sedimentary
Botryoidal Lace Agate
Agate (Silicon Dioxide, SiO2)
mineral
Yellow Aventurine
Quartzite with Muscovite/Goethite inclusions (SiO2)
metamorphic
Chrysocolla
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Hydrated Copper Phyllosilicate)
mineral
Sandstone with Manganese Oxide Patina
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Rough Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Quartz Geode (Nodule)
Silicon Dioxide (SiO2)
sedimentary or igneous
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Sandstone (Red Sandstone / River Stone)
Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)
sedimentary
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Iron-Stained Quartz
Silicon Dioxide with Iron Oxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2) with Iron Oxide impurities
mineral
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Sandstone (Ferruginous)
Arenite (with Iron Oxides)
sedimentary
Red Sandstone
Arenite (composed primarily of Quartz and Iron Oxide)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)
mineral
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Red Sandstone
Sandstone (principally Quartz with Iron Oxide coating)
sedimentary
Limonitic Sandstone (Stained Sandstone)
Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining
sedimentary
Coprolite
Fossilized Feces
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
sedimentary
Red Sandstone (Hematitic)
Clastic sedimentary rock (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
sedimentary
Sandstone
Arenite
sedimentary
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Granite
Granite
Igneous
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Amethyst Geode (polished heart-cut)
Silicon Dioxide (SiO2) with iron impurities
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz with inclusions (likely Chlorite or Hornblende) and country rock
SiO2 (Quartz) with associated ferromagnesian minerals
Mineral/Igneous/Metamorphic association
Botryoidal Hematite (Iron Stone Conglomerate)
Hematite (Fe2O3) in sedimentary matrix
sedimentary
Marble
Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)
metamorphic
K2 Azurite Granite / K2 Stone
Granite (igneous rock) with Azurite inclusions (mineral)
igneous