Halite
Sodium Chloride (NaCl)
Mineral
Category
Sedimentary (Chemically Precipitated)
Browse sedimentary (chemically precipitated) specimens identified by the Rock Identifier community.
Red Jasper (beads)
SiO₂ (Silicon Dioxide)
Mineral, variety of chalcedony (microcrystalline quartz)
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Calcite
Calcite (Mineral, Calcium Carbonate - CaCO3)
Mineral
Quartz
Quartz (SiO2)
Mineral
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
mineral
Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Mineral
Quartz Mica Schist
Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)
metamorphic
Aragonite Star Cluster (or Aragonite Sputnik)
Aragonite (Orthorhombic Calcium Carbonate, CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Chert (or possibly Flint)
SiO2 (Silicon Dioxide)
Sedimentary Rock
Amber
Succinite (specifically for Baltic amber); chemical formula approximately C10H16O
Mineraloid
Sandstone
Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)
Sedimentary
Druzy Quartz Geode (likely Smokey Quartz variety)
Silicon Dioxide (SiO2) - specifically a geode formation lined with druzy quartz crystals, with a likely brownish hue indicating smokey quartz.
Mineral structure/Rock
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Organic Diamond/Gemstone (often associated with Sedimentary sequences)
Quartzite
Quartzite (primarily SiO2)
metamorphic
Chert (varietal known as Jasper or Flint)
Silicon Dioxide (SiO2)
Sedimentary Rock
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Sulfur
Native Sulfur (S8)
mineral
Concrete with Exposed Aggregate
Anthropogenic conglomerate (Concrete)
man-made rock (sedimentary analogue)
Flint
Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)
Mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Red Jasper (with Quartz inclusions)
Silicon Dioxide (SiO2)
sedimentary (physico-chemical)
Clear Quartz (beads in a bracelet)
Quartz (SiO2)
Mineral
Chert (Flint)
Chert (predominantly SiO₂ - silicon dioxide)
sedimentary
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Mineral
Quartz (possibly milky quartz)
Quartz (Silica; SiO₂)
Mineral
Conglomerate
Conglomerate
Sedimentary Rock
Amber
Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O
Organic mineraloid
Pyrite
Iron Pyrite (FeS₂)
Mineral
Sandstone
Arenite (general term for sandstone)
Sedimentary Rock
Greywacke (likely)
Greywacke (a type of sandstone)
Sedimentary
Quartz (likely macrocrystalline variety)
Quartz (SiO₂)
Mineral
Banded Iron Formation
Banded Iron Formation (BIF)
Sedimentary Rock
Jasper
Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)
Mineral
Gossan with Copper Carbonate (Chrysocolla/Malachite)
Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)
Mineral/Sedimentary Interface
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Sandstone
Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)
Sedimentary Rock
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral, often found as detrital grains in sedimentary rocks
White Jade / White Chalcedony
Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)
Mineral
Quartz
Quartz (SiO₂ - Silicon Dioxide)
mineral