White Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Igneous And Metamorphic Derivative (Weathered)
Browse igneous and metamorphic derivative (weathered) specimens identified by the Rock Identifier community.
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Quartz
Silicon Dioxide (SiO2)
mineral
Quartz-rich rock, possibly milky quartz or quartzite
Quartz (silicon dioxide, SiO₂); if granular and foliated, likely quartzite
mineral
Quartz pebble with a conchoidal chip
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Lichen-covered graywacke or granitic glacial cobble
Indeterminate; likely quartz–feldspar–mica rock, possibly weathered granite or granodiorite
igneous
Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Glacially transported granite and gneiss boulders
Granite (quartz–feldspar–mica); banded specimens likely gneiss
igneous and metamorphic
White quartz pebble (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz (specifically Citrine or Yellow Quartzite pebble)
Silicon Dioxide (SiO2)
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Banded Agate (Tumbled)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz Pebble
Silicon Dioxide (SiO2) Pebble
sedimentary
Likely weathered granite or granitic gneiss fragment
Granite: quartz + feldspar + mica; possibly gneiss if foliation is confirmed
igneous
Likely quartz-rich river pebble
Milky quartz or quartz-bearing granitic/gneissic fragment (SiO₂-dominant)
igneous
Granite Pebble
Phaneritic Felsic Igneous Rock
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Likely weathered mica-rich rock fragment
Probable schist, composed mainly of quartz, feldspar, and mica
metamorphic
Quartzite
Quartzite (mainly SiO2)
metamorphic
Quartz (Raw Chunk)
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Granite (plutonic felsic intrusive rock)
igneous
Granite (Gneissic / Weathered Pebble)
Felsic intrusive igneous rock (Granite)
igneous
Yellow Quartz (Citrine Quartz / Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Native Gold (in Jewelry)
Gold (Au)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartz (Smoky/Rose Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Diorite (Porphyritic) / Granite
Plutonic Igneous Rock (Granodiorite / Diorite)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Rounded gray-green beach pebble
Likely basalt or fine-grained volcanic rock; exact identification requires testing
igneous
Quartz (Clear/Crystalline)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Weathered quartz-rich cobble (probable quartzite or silicified rock)
Quartzite, predominantly SiO₂; exact identification is uncertain from the photograph
metamorphic