Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
Category
Browse metamorphic rock (variety of quartz) specimens identified by the Rock Identifier community.
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
Banded Marble
Recrystallized Calcite (CaCO3)
Quartzite Pebble
Quartzite (Silicon Dioxide: SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Quartz (Smoky/Grey variety)
Silicon Dioxide (SiO2)
Demantoid Garnet on Matrix
Demantoid (variety of Andradite Garnet) - Ca3(Fe3+)2(SiO4)3
Quartzite River Rock
Metamorphosed Quartz-rich Sandstone (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Cloudy Quartz (or Milky Quartz)
Silicon Dioxide (SiO2)
Red Jasper
Microcrystalline Quartz (SiO2)
Gneiss with Quartz Vein
Gneiss (containing SiO2 vein)
Smoky Quartz
Silicon Dioxide (SiO2)
Gneiss (specifically a weathered or stream-worn specimen)
Gneiss (Foliated Metamorphic Rock)
Banded Agate
Agate (Cryptocrystalline Quartz, SiO2)
Riverstone Quartzite
Quartzite (primarily SiO2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Agate (Slab)
Agate (Cryptocrystalline variety of Quartz, SiO2)
Biotite Schist
Biotite Schist
Quartzite Cobble
Quartzite (primarily SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Quartz (Smoky or Clear variety with inclusions)
Silicon Dioxide (SiO2)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Quartz (Druzy)
Silicon Dioxide (SiO2)
Quartzite river pebble
Recrystallized Quartz (SiO2)
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Banded Agate
Chalcedony (cryptocrystalline variety of Quartz), SiO2
Gneiss
Gneiss
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Granite
Granite (Felsic Plutonic Rock)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Litharenite)
Gneiss (Green Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Tiger's Eye (with Blue Tiger's Eye / Hawk's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
Gneiss with Quartz/Feldspar Vein
Quartz-Feldspathic Gneiss
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Quartzite River Pebble
Quartzite (primarily SiO2)
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2)
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)