Quartz with Schist Matrix
Crystalline Silicon Dioxide (SiO2) in micaceous schist
metamorphic
Category
Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
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Clear quartz sphere
Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz
mineral
Grey Jasper (Tumbled Quartz variant)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Clear Quartz (Faceted Crystal)
Silicon Dioxide (SiO2)
mineral
Quartzite with inclusions or a banded chert
Quartzite or Chert
Metamorphic or Sedimentary
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert Breccia (with Iron Staining)
Microcrystalline Quartz (SiO2) with iron oxides (Limonite/Goethite)
sedimentary
Picture Jasper
SiO2 (Impure Microcrystalline Quartz)
sedimentary
Quartz (Smoky/Milky Variety)
Silicon Dioxide (SiO2)
mineral
Banded Iron Formation (BIF)
Banded Iron Formation
Sedimentary
Quartz Pebble / Quartzite Pebble
SiO2 (Silicon Dioxide)
sedimentary
Quartz Vein in Gneiss or Schist
Silicon dioxide (SiO2) within metamorphic host rock
metamorphic
Fairburn Agate / Agate-bearing Breccia
Cryptocrystalline Quartz (SiO2) within Jasper/Breccia matrix
sedimentary
Quartz (Milky Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Gold-bearing Quartz
Quartz (SiO2) with associated pyrite or native gold
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Tumbled Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pink Granite with Quartz Vein
Phaneritic Plutonic Felsic Rock (K-feldspar + Quartz + Plagioclase + Mica)
igneous
Black granite (likely polished gabbro or diabase)
Granitoid rock dominated by feldspar, quartz, and dark mafic minerals; exact identification requires testing
igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Mineral in Metamorphic/Igneous Host
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled quartz-rich stone, possibly blue quartz or granite
Quartz (SiO₂), with probable feldspar and dark accessory minerals
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Banded calcite (likely marble or calcite-rich limestone)
Calcite, CaCO₃; possibly calcitic marble
metamorphic
Basalt
Fine-grained mafic volcanic rock, chiefly plagioclase feldspar, pyroxene, and commonly olivine
igneous
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Chert Nodules (with Gryphaea or Shell inclusions)
Microcrystalline Quartz (SiO2) with Calcitic inclusions
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled brown quartz/chert pebble
Microcrystalline quartz (SiO₂), possibly chert or jasper
mineral
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz-Veined Basalt River Stone
Basalt with milky quartz (SiO2) vein
igneous
Veined Quartzite Pebble (Heart-Shaped)
Metamorphosed quartz-rich sandstone with quartz veins
sedimentary
Painted River Pebble (likely Basalt or Greywacke)
Aphanitic Lithic Clast with Anthropogenic Pigment coating
Sedimentary or Igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral