Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Category
Sedimentary (Chemically Precipitated Mineral)
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Chemically Precipitated Mineral) in the encyclopedia
View all →
Quartz / Quartzite
Silicon Dioxide (SiO2)
Mineral / Metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz (Milky or Rough Quartz)
Silicon Dioxide (SiO2)
mineral
Limonite after Pyrite (Pseudomorph)
FeO(OH)·nH2O following FeS2
mineral
Tumbled Quartz (Peach Quartz / Red Quartz)
Silicon Dioxide (SiO2)
mineral
Dendritic Chert
Silicon Dioxide with Manganese Oxide Inclusions (SiO2 + MnO2)
sedimentary
Brown Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Green variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Chert or Jasper
Silicon Dioxide (SiO2)
sedimentary
Brecciated quartz-rich rock, possibly silicified breccia
Silica-rich breccia; chiefly microcrystalline quartz (SiO₂), with possible calcite and iron-oxide staining
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Banded Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Carnelian Agate Nodule
Chalcedony (SiO2) with Iron Oxide inclusions
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Chert (or Chalcedony) Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Ironstone (Limonitic Sandstone)
Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)
sedimentary
Iron Gossan (Limonite/Goethite)
Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Host rock) with Quartz or Calcite amygdules
igneous
Flint Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Field Stone)
Chert (SiO2)
sedimentary
Amber
Succinicum (C10H16O)
mineral
Yellow Quartzite (River Cobble)
Quartzite (SiO2)
metamorphic
Tumbled yellow calcite
Calcite (calcium carbonate, CaCO₃)
mineral
Blue magnesite beads
Magnesite (MgCO₃), likely stabilized or dyed; brown veining may reflect matrix or iron oxides
mineral
Chert (and Limestone)
Chert (consisting of Microcrystalline Quartz, SiO2)
sedimentary
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
mineral
Cinnabar
Mercury(II) sulfide (HgS)
mineral
Pyrite (or Fool's Gold)
Pyrite (FeS₂)
Mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Druzy Quartz (on Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Limestone (River Pebble)
Calcite (Calcium Carbonate) - CaCO3
sedimentary
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Chert (specifically Dark Chert or Flint)
Silicon dioxide (SiO2)
sedimentary
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary