Chert (Field Stone/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Mineral Based Alloy (Anthropogenic)
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Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (SiO2 dominated)
sedimentary
Diorite
Intermediate plutonic igneous rock
igneous
Quartz with Mica (Pegmatite)
Quartz (SiO2) and Muscovite (KAl2(AlSi3O10)(OH)2)
igneous
Biotite on Quartz Matrix
Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)
mineral
Mica Schist
Schist (Biotite/Muscovite rich)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Diorite (River Cobble)
Intermediate plutonic igneous rock
igneous
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
![Granite with Quartz Vein (Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)) — igneous](https://media.rockidentification.com/50ebadd6-ed66-4e73-abce-e70c662464c5-thumbnail.jpg)
Granite with Quartz Vein
Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)
igneous
Quartzite with Mica
Metamorphic Quartzite (SiO2 + Mica phyllosilicates)
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
mineral
Greenstone
Metabasalt / Chlorite-Epidote Schist
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Weathered Quartzite or Chert Pebble
Silicon Dioxide (SiO2)
metamorphic or sedimentary
Greenstone
Metabasalt
metamorphic
Chert (Pink and Yellow Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Quartz Crystal (specifically a Double-Terminated variety)
Silicon Dioxide (SiO2) - Low Quartz
mineral
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions (SiO2)
igneous
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
metamorphic
Diorite
Phaneritic plutonic rock (dominated by plagioclase feldspar and hornblende)
igneous
Mica Schist
Mica Schist (with Muscovite)
metamorphic
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Amygdaloidal Rhyolite
Rhyolite (felsic volcanic rock) with amygdules
igneous
Banded River Stone (Greywacke or Siltstone subtype)
Sedimentary Banded Siltstone
sedimentary
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Nuummite
Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)
metamorphic
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Diorite (River Cobble)
Intrusive Igneous Diorite
igneous
Granitic Gravel Piece
Granite (Felsic Plutonic Rock / SiO2 with Al2O3, K2O, Na2O)
igneous
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Schist
Mica Schist
metamorphic
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Talc (Soapstone variety)
Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2
mineral
Schist/Phyllite
Metamorphic Schist (Chlorite Schist variety)
metamorphic
Basalt with Epidote Veining
Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous