Quartzite pebble
Quartzite (SiO2 dominated)
metamorphic
Category
Metamorphic Rock
Browse metamorphic rock specimens identified by the Rock Identifier community.
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Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Quartzite
Quartzite (SiO2)
Metamorphic
Rough Dark Green Sapphire
Corundum (Al2O3)
mineral
Quartzite
Quartzite (mainly SiO2)
metamorphic
Garnet-Mica Schist
Schist (variety with Almandine Garnet, Fe3Al2(SiO4)3)
metamorphic
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz Cobble (River Rock)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Citrine Geode Fragment
Citrine (Silicon Dioxide with Iron Impurities), SiO2
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (SiO2 silicon dioxide)
metamorphic
Quartz (Milky/Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (with possible Feldspar inclusions)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Greenstone (Altered Mafic Rock)
Greenschist / Meta-basalt
metamorphic
River Rock (Quartzite/Chert conglomerate)
Quartzite (SiO2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Mineral
Muscovite on Quartz (Mica host rock)
KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)
igneous/metamorphic
Schist (Micaceous)
Mica Schist
metamorphic
River Pebbles and Quartz
Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)
mixed
Rough Garnet in Matrix
Almandine Garnet (Fe3Al2Si3O12)
mineral
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
Mineral
Quartzite
Quartzite
Metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Green Aventurine in Host Rock
Quartz (SiO2) with Fuchsite inclusions
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Granodiorite (Gneissic Pebble)
Granodiorite displaying minor foliation
igneous/metamorphic
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Granite or Granitic Gneiss River Rock
Granite / Gneiss
Igneous or Metamorphic
Quartzite (River-worn pebble)
Quartzite (Mainly SiO2)
metamorphic
Unidentified River Rock or Mudstone
N/A (Generic rock fragment)
Sedimentary or Metamorphic