Quartzite (with Metamorphic Foliation)
Quartzite (Recrystallized SiO2)
metamorphic
Category
Quartz
Browse quartz specimens identified by the Rock Identifier community.
Chert (Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Herkimer Diamond
Quartz (Silicon Dioxide) - SiO2
mineral
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Ferruginous Sandstone
Arenite with Hematite/Limonite cement
sedimentary
Amethyst (Tumbled)
Amethyst (Silicon Dioxide with Iron impurities) - SiO2
mineral
Bicolor Quartz (Milk Quartz with Slag or Dark Inclusions)
Silicon Dioxide (SiO2) with impurities
mineral
Granite with Epidote
Granite, containing quartz, feldspar, and epidote
Igneous
Amethyst (Chevron Amethyst/Dream Amethyst)
Silicon Dioxide (SiO2) with trace Iron impurities
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite
Granite
igneous
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Rough Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Yellow Citrine Quartz
Silicon Dioxide (SiO₂)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Banded Agate (White Agate)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Quartzite with Quartz Veins
Quartzite (chiefly SiO2)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Agate / Banded Chalcedony
Agate (Silicon Dioxide / SiO2)
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphosed Sandstone (SiO2)
metamorphic
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Smoky Quartz (with inclusions)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Smoky Quartz
Quartz (Silicon Dioxide) - SiO2
mineral
Agate
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Green Aventurine
Silicon dioxide (SiO2) with fuchsite inclusions
mineral
Breciated Chert
Brecciated Chert (Microcrystalline Quartz, SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Gold Flake / Placer Gold
Native Gold (Au)
mineral
Quartzite
Quartzite (SiO2)
metamorphic