Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary Rock Or Mineral (Depending On Origin And Purity)
Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock Or Mineral (Depending On Origin And Purity) in the encyclopedia
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Nephrite Jade
Tremolite-Actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
River Pebble
Quartzo-feldspathic rock fragment
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
River Pebble
Weathered Sedimentary Rock Fragment
sedimentary
Jasper and Quartz Breccia
Silicified Breccia / Microcrystalline Quartz
sedimentary
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Sedimentary Rock
Weathered fossiliferous limestone, likely coral or shell fragment
Calcite (CaCO₃), biogenic limestone; exact fossil taxon indeterminate from the image
fossil
Sandstone (Wonderstone)
Arenite (composed primarily of SiO2 with Fe2O3 impurities)
sedimentary
Quartzite (Milky)
Quartzite (SiO2)
metamorphic
Tumbled jasper/chert, possibly brecciated jasper
Microcrystalline quartz (SiO₂), with iron-oxide staining and possible chalcedony
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz Druzy Geode
Silicon Dioxide (SiO2)
mineral
Sandstone Pebble
Sandstone (Silicon dioxide-rich clastic sedimentary rock)
sedimentary
Halite
Sodium Chloride (NaCl)
mineral
Polished brecciated jasper
Jasper, an opaque microcrystalline variety of chalcedony (SiO₂), with iron-oxide staining
mineral
Small polished dark mineral or gemstone fragment
Indeterminate; possibly smoky quartz, obsidian, or dark tourmaline
mineral
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Polished red gemstone pendant, likely red jasper or brecciated jasper
Jasper: microcrystalline quartz (SiO₂), commonly with hematite or iron-oxide inclusions
metamorphic
Gravel and Sand Aggregate
Unconsolidated Clastic Sediment
sedimentary
Vein-filled Sedimentary Rock
Silicified sedimentary rock with quartz/calcite vein
sedimentary
Sedimentary Outcrop (Sandstone/Shale)
Sedimentary bedrock formation (variable composition)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Amber
Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.
Mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Blue-green polished stone (possibly turquoise)
Uncertain from the image; turquoise is hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartz Heart or Arrowhead Shape
Silicon Dioxide (SiO2)
mineral
Hagstone (Adder Stone)
Chert or Sedimentary pebble with natural perforation
sedimentary
Banded gneiss
Orthogneiss or paragneiss, chiefly quartz–feldspar–mica
metamorphic
Gold Nugget
Gold (Au)
mineral
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Wishing Stone (Basalt/Siltstone with Quartz/Calcite vein)
Carbonaceous Siltstone with Quartz (SiO2) or Calcite (CaCO3) vein
sedimentary
Geode (Unopened)
Chalcedony Geode (Hydrated Silicon Dioxide, SiO2)
sedimentary
Rough Diamond
Diamond (Native Carbon, C)
mineral
Fossilized Bivalve Shell
Class Bivalvia (fossilized)
fossil
Mixed Mineral Collection
Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)
mineral
Sandstone (Quartz-rich)
Arenite (SiO2 based)
sedimentary