Quartzite with inclusions or a banded chert
Quartzite or Chert
Metamorphic or Sedimentary
Category
Metamorphic Or Sedimentary
Browse metamorphic or sedimentary specimens identified by the Rock Identifier community.
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River Cobble (likely Quartzite or Limestone)
SiO2 (Quartzite dominant) or CaCO3 (Limestone dominant)
metamorphic or sedimentary
Greenstone / Glauconitic Siltstone
Metabasalt or Glauconite-rich Sedimentary Rock
metamorphic or sedimentary
Quartzite and Chert
Silicon Dioxide (SiO2)
metamorphic and sedimentary
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Blue Quartz
Quartz (SiO2) with inclusions
Mineral
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Quartz (Float/Abraded)
Quartz (SiO₂)
Mineral
Amethyst
Quartz (SiO2) variety
Mineral
Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Quartz
Silicon dioxide (SiO₂)
Mineral
Milky Quartz
Quartz (SiO₂)
Mineral
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
Quartz (Crystal/Druzy Quartz)
Quartz (SiO₂)
Mineral
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Mineral
Agate (various color varieties)
SiO₂ (Silicon Dioxide)
Mineral (specifically a variety of Chalcedony, which is a microcrystalline quartz)
Sodalite (blue beads) and Clear Quartz (clear beads)
Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2
mineral
Included Quartz Beads (likely Phantom Quartz or Garden Quartz)
Quartz (SiO2) with various mineral inclusions
Mineral
Peridot and Citrine Gemstones (in a ring setting)
Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)
mineral
Green Aventurine and Clear Quartz
Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)
Mineral
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Mineral
Quartz
Quartz (SiO2, Silicon Dioxide)
Mineral
Pink Stained Rock (Likely Quartzite or Sandstone with Iron Oxide Staining)
Quartzite (metamorphic) or Sandstone (sedimentary); coloration likely due to hematite or other iron oxides.
Metamorphic or Sedimentary (with staining)
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Prasiolite and Quartz Crystal Cluster
Quartz (SiO2); Prasiolite is a variety of Quartz
mineral
Quartz (River Pebble)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral with metamorphic or sedimentary host
Mica-rich Sandstone or Micaceous Schist Weathering
Micaceous Schist (Muscovite-Quartz composition)
Metamorphic or Sedimentary depending on local grade
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Zoisite with Hornblende
Zoisite (Ca2Al3(SiO4)3(OH)) with Amphibole inclusions
metamorphic
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
Kyanite
Kyanite (Al2SiO5)
mineral
Orange Calcite (likely polished specimen)
Calcite
Mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Garnet in Matrix
Almandine Garnet (Fe3Al2(SiO4)3)
metamorphic
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Sedimentary or Metamorphic
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral