Smoky Quartz
Silicon Dioxide (SiO2)
Category
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Smoky Quartz
Silicon Dioxide (SiO2)
Eclogite
Eclogite (Pyrope garnet and Omphacite pyroxene)
River Pebble (Graywacke/Sandstone)
Lithic Sandstone
Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
Blue Kyanite
Kyanite (Al2SiO5)
Greenschist
Greenschist (Major minerals include Chlorite, Actinolite, and Epidote)
Basalt (Amygdaloidal)
Amygdaloidal Basalt
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)
Quartz (SiO₂ - Silicon Dioxide)
Orange Calcite
Calcium Carbonate (CaCO3)
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
Diorite
Diorite (plutonic igneous rock)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Granite River Pebble
Granite
Chert Breccia
Brecciated Chert (Microcrystalline Silica, SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Greenschist
Greenschist (Chlorite-actinolite schist)
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
Sandstone
Arenite
Cloud Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz (likely milky/gray variety)
Quartz (SiO₂)
Quartz with Oxides
Silicon Dioxide (SiO2)
Gneiss (Granitic Gneiss)
Gneiss
Diamond
Natural Diamond (Carbon, C)
Diamond (in jewelry setting)
Cubic Carbon (C)
Iron-Stained Quartzite
Recrystallized Meta-Quartzite (primarily SiO2)
Citrine
Silicon Dioxide (SiO2)
Nephrite Jade
Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)
Green Quartzite
Quartzite (SiO2 with inclusions)
Basalt with Epidote (Greenstone)
Epidote-bearing Metabasalt
Blue Quartzite
Quartzite (mostly SiO2 with mineral inclusions)
Schist
Mica Schist
Marble (Carrara style)
Recrystallized Calcite-rich Metamorphic Rock (CaCO3)
Quartz (Milky/Bull Quartz)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
River Pebble (Gneiss or Quartzite mixture)
Metamorphic rock (Commonly Gneissic)
Limonite with Quartz
FeO(OH)·nH2O (Limonite) with SiO2 (Quartz)
Clear Quartz Sphere
Quartz (Silicon Dioxide, SiO2)
Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)
Epidote with Black Hornblende and White Quartz mixture
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions