Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Or Sedimentary
Browse metamorphic or sedimentary specimens identified by the Rock Identifier community.
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Clear Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Banded Marble
Recrystallized Calcite (CaCO3)
metamorphic
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
metamorphic
Banded Slate (Sedimentary Pebble)
Slate (Metamorphosed Shale or Mudstone)
metamorphic
Kyanite in Quartz
Al2SiO5 in SiO2
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Biotite Schist
Biotite Mica Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Siltstone or Fine-grained Sandstone pebble
Siltstone (primarily SiO2 with clay minerals)
sedimentary
Gneiss
Gneiss
metamorphic
Yellow Aventurine (or Citrine-colored Quartz)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gneiss (Green Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Black Agate
Silicon Dioxide (SiO2) with carbon/iron inclusions
sedimentary
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Phyllite
Phyllite
metamorphic
Greenstone (Epidosite / Chlorite Schist)
Metabasalt (often contains Epidote Ca2Al2(Fe3+,Al)(SiO4)(Si2O7)O(OH) or Chlorite)
metamorphic
Greenschist
Chlorite schist
metamorphic
Yellow Quartzite Pebble
Quartzite (SiO2)
metamorphic
Kyanite
Kyanite (Al2SiO5)
mineral
Gneiss
Gneiss
metamorphic
River Rock (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneiss)
metamorphic
Greenstone
Greenschist / Meta-basalt
metamorphic
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
High-grade regional metamorphic rock
metamorphic
Almandine Garnet
Iron aluminum silicate - Fe3Al2(SiO4)3
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Shungite
Non-crystalline carbon (high-carbon metamorphic rock)
metamorphic
Marble
Recrystallized Calcite (CaCO3) / Marble
metamorphic
Gneiss
Gneiss
metamorphic
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
metamorphic
Marble
Recrystallized Calcite / Dolomite (CaCO3)
metamorphic