Pink Granite
Phaneritic intrusive igneous rock (Granite)
igneous
Category
Mineralogical Specimen
Browse mineralogical specimen specimens identified by the Rock Identifier community.
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Banded Calcite (Mexican Onyx)
Banded Calcite (CaCO3)
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
sedimentary
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Iron-stained)
Silicon Dioxide (SiO2)
sedimentary
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2(SiO3)6)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chalcedony Pebble
Cryptocrystalline Quartz (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
White Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Quartzite
Metamorphic Quartz (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Microcrystalline/Gravel)
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Granite (composed mainly of Quartz, Feldspar, and Mica)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized oyster or bivalve shell
Fossil Gryphaeidae or Ostreoidea; calcitic shell, CaCO₃
fossil
Tumbled brown stone, likely tiger’s-eye or jasper
Quartz-rich microcrystalline silica, likely SiO₂ (possible tiger’s-eye; identification uncertain from image)
mineral
Tumbled yellow quartz (likely citrine or iron-stained quartz)
Quartz, SiO₂; yellow color from trace iron or irradiation/heat-related coloration
mineral
Yellow-green jasper or serpentine-rich rock
Likely microcrystalline quartz (SiO₂) with iron-bearing and/or serpentine minerals; exact identification requires testing
mineral
Tumbled orange chalcedony (likely carnelian)
Cryptocrystalline quartz, SiO₂; carnelian is orange-red chalcedony colored mainly by iron oxides
gemstone
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Polished tourmalinated quartz
Quartz (SiO₂) with black schorl tourmaline (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) inclusions
mineral
Likely rose quartz-bearing pegmatite
Quartz (SiO₂), probably with feldspar and iron-oxide staining
mineral
Green aventurine (likely)
Quartzite dominated by quartz (SiO₂), colored green by fuchsite mica or chlorite
mineral
Chert / Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Beach Pebble
Quartzite (primarily SiO2)
metamorphic
Sandstone (Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Chert / Flint Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Pegmatitic Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Quartz Pebble
Silicon dioxide (SiO2)
mineral