K-Feldspar Granite Fragment
Granite (Alkali Feldspar-rich)
igneous
Category
Sedimentary Or Igneous Associated Mineral
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Orbicular Rhyolite (Rainforest Jasper)
Rhyolite containing Spherulites (SiO2 with impurities)
igneous
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Granite / Arkosic Sandstone (Coarse Igneous or Sedimentary Aggregate)
Granite / Quartz-Feldspar Aggregate
igneous
Healer's Gold (Pyrite and Magnetite in Schist)
Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist
metamorphic
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
metamorphic
Fluorite
Calcium fluoride (CaF2)
mineral
Eudialyte
Na15Ca6(Fe2+,Mn2+)3Zr3(Si,Nb)Si25O73(O,OH,H2O)3(Cl,OH)2
mineral
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Likely garnet-bearing schist or gneiss
Mica schist/gneiss containing quartz, feldspar, mica, and probable almandine garnet
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Weathered quartz-rich metamorphic rock (probable gneiss or quartzite)
Biotite–quartz–feldspar gneiss, possibly micaceous quartzite
metamorphic
Satin Spar (Gypsum)
Gypsum (Satin Spar variety) - CaSO4·2H2O
mineral
Granite with Pyrite or Mica
Phaneritic intrusive igneous rock
igneous
Mixed river stones; foreground likely sandstone
Quartz-rich sandstone, with associated rounded quartzite/chert and other cobbles
sedimentary
Yellow Aventurine
Quartz (Silicon Dioxide, SiO2) with inclusions
mineral
Agate
Chalcedony (SiO2)
sedimentary
Shale or Slate
Shale (Sedimentary) or Slate (Metamorphic)
sedimentary or metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Gold
Native Gold (Au)
mineral
Rough garnet-bearing metamorphic rock
Likely garnet amphibolite or garnet-bearing schist; garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂)
metamorphic
Yellow-green serpentine (likely)
Serpentine-group phyllosilicate, commonly lizardite or antigorite; approximate formula Mg₃Si₂O₅(OH)₄
mineral
Lapis Lazuli
Lapis Lazuli (Rock composed mainly of lazurite, calcite, and pyrite)
gemstone
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with mineral inclusions
Mineral/Mineraloid within a rock matrix
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Red Agate
Chalcedony (SiO2)
gemstone
Chalcopyrite (Peacock Ore)
Copper Iron Sulfide (CuFeS2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Garnet-bearing metamorphic rock, likely garnet gneiss or garnet amphibolite
Garnet-bearing gneiss; red crystals likely almandine garnet, Fe₃Al₂(SiO₄)₃
metamorphic
Quartz Vein in Schist
Quartz-rich Micaceous Schist (SiO2 + phyllosilicates)
metamorphic
Milky quartz vein rock
Quartz, silicon dioxide (SiO₂), likely massive vein quartz with iron-oxide staining
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Jasper (Chert / Chalcedony)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Tumbled green aventurine
Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica or chlorite
mineral
Weathered schist or gneiss
Quartz–feldspar–mica metamorphic rock
metamorphic
Turquoise
Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O
mineral
Geode with Quartz Crystals
SiO2 (Silicon Dioxide) in a geode formation
Sedimentary/Igneous (depending on host rock)
Pegmatite (Quartz and Feldspar with Dark Minerals)
Igneous Pegmatite
igneous
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic