Yellow Quartz (Citrine Quartzite)
Silicon Dioxide (SiO2)
metamorphic
Category
Glass
Browse glass specimens identified by the Rock Identifier community.
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Quartzite Pebble
Quartzite (Silicon Dioxide: SiO2)
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Chalcedony (Agate/Chert)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite Pebble (River Rock)
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz (Milk/Citrine variety)
Silicon Dioxide (SiO2)
mineral
Chert / Flint Nodule
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Grain
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Citrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartzite (Iron-stained)
Quartzite (SiO2 with Iron oxide inclusions)
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Siltstone-Chert mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Quartzite Pebble)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Granite Pebble
Phaneritic Felsic Igneous Rock
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (River Pebble)
Meta-quartzite (composed primarily of SiO2)
metamorphic
Quartz Vein in River Siltstone
Crystalline Quartz (SiO2) in Siliclastic Matrix
sedimentary
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Obsidian
Obsidian (Volcanic glass), 70-75% SiO2
igneous
Pumice
Highly vesicular rhyolite/dacite (Amorphous glass)
igneous
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite with Hematite staining
Metamorphosed Quartz Sandstone (SiO2)
metamorphic