Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Raw quartz specimen (likely milky or smoky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
metamorphic
Milky quartz (rough quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled quartz crystal (probable)
Quartz, silicon dioxide (SiO₂)
mineral
Milky quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz (rough quartz crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
metamorphic
Tumbled quartz (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz (likely tumbled or naturally worn)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz-rich rock, likely milky quartz or quartzite
Quartz (SiO₂), possibly quartzite if metamorphically recrystallized
mineral
Garnetiferous Quartzite (Garnet Gneiss Pebble)
Garnet-bearing Quartzite or Quartz-Feldspar Gneiss
metamorphic
Jadeite
NaAlSi2O6; Jadeite silicate mineral
metamorphic
Dark rock/mineral fragment
Undetermined; possibly magnetite-rich basalt or iron sulfide
mineral
Chrysocolla Cuprite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) and Cu2O (Cuprite)
mineral composite
Schist
Metamorphic rock (Schist)
metamorphic
Iron-rich rock or Concretion
Ironstone or Limonite concretion
sedimentary
Sulfur (on Matrix)
Native Sulfur (S8)
mineral
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Travertine
Calcium Carbonate (CaCO3)
sedimentary
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Greenstone or Epidote-rich Metamorphic Rock
Chlorite/Epidote Schist or Greenstone
metamorphic
Limonite Concretion / Ironstone
Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O
mineral
Gneiss
Gneiss (pronounced 'nice')
Metamorphic Rock
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Quartz-rich rock or quartz specimen
Quartz (SiO₂), likely massive quartz or quartz-bearing host rock
mineral
Basalt Porphyry
Porphyritic Basalt
igneous
Granite Pebble
Phaneritic intrusive igneous rock
igneous
Granite
Granite
igneous
Granite
Granite
igneous
Diamond in Kimberlite
Kimberlite Matrix with Carbon (Diamond)
igneous
Granite
Granite
Igneous
Granite
Granite
Igneous
Copper Ore (Malachite and Azurite on Host Rock)
Cuprite, Malachite, and Azurite dissemination in gangue
mineral