Chert (Tan/Grey)
Chert (Silicon Dioxide, SiO2)
sedimentary
Category
Mineral, Often Found As A Rock (Metamorphic)
Browse mineral, often found as a rock (metamorphic) specimens identified by the Rock Identifier community.
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Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
metamorphic
Chert (Iron-stained)
Chert (Silicon Dioxide, SiO2)
sedimentary
Serpentinite (often called Jade or Nephrite substitute)
Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)
metamorphic
Chert (Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (principally SiO2)
metamorphic
Banded Gneiss
Gneiss (Metamorphic silicate rock)
metamorphic
Peridot
Olivine ((Mg,Fe)2SiO4)
mineral
Quartz Vein in Host Rock
Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)
metamorphic
Greenstone (likely chlorite- or epidote-rich metamorphic rock)
Greenstone; commonly metamorphosed basalt or dolerite, with chlorite, epidote, and actinolite
metamorphic
Garnet Schist
Almandine Garnet in Micaceous Schist
metamorphic
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Chert (Flint)
Chert (SiO2)
sedimentary
Quartz (Milky or Rose variety)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (SiO2 matrix with varying clasts)
sedimentary
Schist
Schist (variety likely Mica Schist)
metamorphic
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Quartz Grain
Silicon Dioxide (SiO2)
mineral
Arsenopyrite in Quartz/Host Rock
Arsenopyrite (FeAsS)
mineral
Lapis Lazuli
(Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2 (Complex silicate rock)
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline silica (SiO2)
sedimentary
Shale (possibly Carbonaceous or Oil Shale)
Argillaceous Sedimentary Rock
sedimentary
Serpentinite
Serpentinite (composed largely of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Nodule)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Fulgurite
Fulgurite (Lechatelierite)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Greenish Feldspathic Rock / Epidote Granite (Unakite-type or Epidote-bearing rock)
Epidotized Metamorphic/Igneous Rock
metamorphic
Chert (Flint)
Chert (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Unakite
Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) and KAlSi3O8)
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Fulgurite
Fulgurite (Lechatelierite)
metamorphic