Garnet (specifically Almandine or Pyrope)
Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)
mineral
Category
Mineral, Specifically An Iron Ore
Browse mineral, specifically an iron ore specimens identified by the Rock Identifier community.
Chalcedony (specifically Agate or Water-worn Quartzite)
Silicon Dioxide (SiO2)
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
Mineral
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Mineral, potentially a rock with chalcedony/jasper.
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Fluorite (Green Fluorite)
Fluorite (Calcium Fluoride, CaF2)
mineral
Copper Bullion Round
Native Copper (refined), Cu
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Jasper Agate (specifically Brecciated Jasper)
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Fluorite (Rainbow/Purple Fluorite)
Calcium Fluoride (CaF2)
mineral
Eudialyte in Syenite (Dragon Blood Stone)
Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2
igneous
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pink Granite
Granite (Phaneritic intrusive rock rich in K-feldspar)
igneous
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Metamorphic
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic
Silver (Morgan Dollar)
Native Silver (Ag) - 90% Silver, 10% Copper alloy
mineral
Gold
Native Gold (Au)
mineral
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Chrome Diopside
Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Pegmatitic Granite
Granite with Orthoclase Feldspar and Quartz (SiO2, KAlSi3O8)
igneous
Slag (Industrial Glass/Byproduct)
Anthropogenic Vitreous Silicate
igneous (anthropogenic)
Slag (Industrial Glass/Metal Waste)
Artificial silicate/ferro-silicate byproduct
Mineraloid (Industrial byproduct)
Agate
Silicon Dioxide (SiO2)
mineral
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica)
metamorphic
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
mineral
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Orthoceras Fossil in Limestone
Orthoceras regulare (Class Cephalopoda; Order Orthocerida)
sedimentary
Erythrite
Erythrite (Cobalt Bloom) - Co3(AsO4)2·8H2O
mineral
Concretion (Sandstone)
Sandstone Concretion
sedimentary
Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
metamorphic