Chert (specifically Flint)
Silicon dioxide (SiO2)
sedimentary
Category
Limestone
Browse limestone specimens identified by the Rock Identifier community.
Chert (Nodule)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Quartzite variety)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Galena
Lead(II) sulfide (PbS)
mineral
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Cryptocrystalline Quartz (Agate/Chert)
Silicon dioxide (SiO2)
sedimentary
Chert (Quartz Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Bay Scallop Shell
Argopecten irradians (Biogenic Calcium Carbonate / CaCO3)
sedimentary
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Fluorite (Purple Octahedron)
Calcium Fluoride (CaF2)
Mineral
Red Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (River Cobble)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Green Jade (specifically Nephrite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Chert (variety Gray or Dark Chert)
Silicon Dioxide (SiO2)
sedimentary
Lapis Lazuli
Complex metamorphic rock primarily composed of Lazurite ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2), Calcite, and Pyrite
metamorphic
Sandstone Geode (Unbroken)
Siliciclastic sedimentary rock (primarily Quartz)
sedimentary
Chert Pebble (Yellow/Brown Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Tiffany Stone
Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)
metamorphic
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (varietal: Flint Pitted Pebble)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Red Chert / Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Epidote Water-Worn Pebble
Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Chert (Commonly called Jasper or Flint)
Chert (SiO2)
sedimentary
Chert (specifically Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Fluorite
Calcium Fluoride (CaF2)
mineral
Chert (Mookaite style Jasper)
Microcrystalline Quartz (SiO2) with Hematite/Goethite inclusions
sedimentary
Chert (often called Jasper or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Travertine (Calcareous Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Tree Agate (also known as Dendritic Agate)
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
Mineral
Chert (and/or River Pebble)
Microcrystalline silica (SiO2)
sedimentary