Yellow Quartzite Pebble
Quartzite (primarily Silicon Dioxide - SiO2)
metamorphic
Category
Man Made Object (Ring)
Browse man made object (ring) specimens identified by the Rock Identifier community.
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Amazonite (or Amazon Stone)
Potassium Feldspar (Microcline), K(AlSi3O8)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
White Agate (Chalcedony)
Agate (Silicon Dioxide - SiO2)
mineral
Feldspar Rich Granite with Limonite Staining
K-Feldspar Granite (KAlSi3O8)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Limestone
Calcareous Sedimentary Rock (CaCO3)
sedimentary
Serpentine
Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn)Si2O5(OH)4
metamorphic
Kyanite
Kyanite (Al2SiO5)
Mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Clear Quartz (Rock Crystal)
Quartz (SiO₂)
Mineral
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Sandstone Clast
Arenite (primarily SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone
Arenite (primarily SiO2 with iron oxide cementation)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Snowflake Obsidian
Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)
Igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Banded Agate (specifically Chalcedony nodule)
Agate (Silicon Dioxide, SiO2)
mineral
Banded Gneiss
Gneiss (typically quartz, feldspar, mica, amphibole composition)
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Amber
Succinite (fossilized tree resin)
mineraloid
Bornite
Bornite (Cu5FeS4)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Orange Quartzite (River Pebble)
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Blue Lace Agate (Heat-treated/Crackle Quartz variety)
Silicon Dioxide (SiO2)
mineral
Marble
Metamorphosed Limestone (main mineral: Calcite, CaCO3)
metamorphic
Kambaba Jasper
Stromatolite (Microbial mat fossil in silicified sediment)
sedimentary
Stromatolite
Biogenic Sedimentary Rock (Lithified microbial mat)
sedimentary
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)
Sedimentary
Yellow Quartzite (River Stone)
Quartzite (composed primarily of Quartz: SiO2)
metamorphic
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Biotite / Black Mica
Biotite K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Prase Quartz on Feldspar
Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)
mineral
Shale with Iron Oxide Staining
Fissile Mudstone (primarily clay minerals and quartz)
sedimentary