Metagabbro / Epidote Gneiss
Epidote bearing Hornblende Gneiss
metamorphic
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
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Slag (Industrial Glass Slag)
Amorphous Silica / Ferro-silicate Slag
mineraloid / anthropogenic
Pink Sapphire (Corundum)
Aluminum Oxide (Al2O3) with Chromium/Iron impurities
gemstone
Quartzite Cobble
Quartzite (composed primarily of SiO2)
metamorphic
Quartzite with inclusions
Quartzite
metamorphic
Blue quartzite or blue aventurine glass-like aggregate
Quartzite, predominantly SiO₂ (identification uncertain from image)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Green Aventurine
Quartz with Fuchsite inclusions (SiO2)
mineral
Beryl (var. Heliodor or Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Iron-rich quartzite or limonite-bearing rock
Quartzite (SiO₂) with iron oxides/hydroxides, chiefly hematite and goethite
metamorphic
Silty Sand / Loam
Unconsolidated Clastic Sediment (Silicon Dioxide / Alumino-silicates mixture)
sedimentary
Orange Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite Geode (unopened)
SiO2 (Silicon Dioxide)
metamorphic
Quartz and Mixed Sedimentary Rocks
Silicon Dioxide (SiO2) mixed with various clastic sedimentary lithologies
sedimentary
Garnet Gneiss
Garnetiferous quartzo-feldspathic gneiss
metamorphic
Iron-stained quartz-rich rock, possibly quartzite or hydrothermal quartz
Quartz (SiO₂), likely with iron oxides; exact host rock uncertain from the photograph
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite or Iron Oxide inclusions
sedimentary
Painted Sandstone
Sandstone (clastic sedimentary rock) with acrylic/artistic coating
sedimentary
Volcanic Tuff (Breccia)
Pyroclastic Tuffaceous Rock
igneous
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Foliated slate or phyllite
Fine-grained metamorphosed mudstone; typically quartz, mica, chlorite, and clay-derived minerals
metamorphic
Quartz
Silicon Dioxide (SiO2)
Mineral
Ruby
Corundum (Al2O3)
mineral
Yellow Quartzite (River Pebble)
Metamorphic Quartzite (predominantly SiO2 with iron oxide inclusions)
metamorphic
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Raw Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Porphyritic Basalt
Basalt (Porphyritic texture)
igneous
Red Sandstone
Arenite (composed primarily of Quartz and Iron Oxide)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Graywacke
Graywacke Sandstone
sedimentary
Porphyritic Basalt (Chinese Writing Stone)
Porphyritic Basalt or Andesite containing plagioclase feldspar phenocrysts
igneous
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Quartzite pebble
Quartzite (primarily SiO2)
metamorphic
Banded mica schist
Mica schist, chiefly muscovite/biotite with quartz and feldspar
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Siltstone
Siltstone (composed of clastic quartz and feldspar grains)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Rounded basalt cobble (probable)
Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene
igneous