Jasper
Silicon dioxide (SiO2) with impurities
Category
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
Jasper
Silicon dioxide (SiO2) with impurities
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert (Polished River Pebble)
Chert (SiO2)
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Yellow Jasper/Flint pebble)
Microcrystalline Quartz (SiO2)
Chert / Flint
Cryptocrystalline quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Coquina
Bioclastic Limestone (Coquina)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Diabase (Dolerite)
Diabase or Dolerite
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
Greenstone
Metamorphic mafic rock (chlorite-actinolite-epidote schist)
Pink Granite
Intrusive Igneous Rock (high K-feldspar content)
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
Chert / Flint
Silicon Dioxide (SiO2)
Chert (varieties: Flint or Jasper)
Silicon dioxide (SiO2) / Microcrystalline Quartz
Tumbled Gabbro
Gabbro (Mafic intrusive igneous rock)
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
Lapis lazuli and green-blue chalcedony jewelry
Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
Diorite
Diorite (Intermediate intrusive igneous rock)
Slag Glass (Cullet)
Amorphous Silica / Glass residue
Fossiliferous Limestone (Crinoid stem fossils)
Sedimentary Limestone with Crinoidea ossicles
Coquina
Biogenic Limestone (Coquina)
Chert (Flint)
Silicon Dioxide (SiO2)
Flint (or Chert)
Cryptocrystalline Quartz (SiO2)
Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz / Chert
Chert (Iron-stained)
Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)
Pyrite
Iron Disulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
Polished white chalcedony or milky quartz pebble
Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion
Chert
Microcrystalline quartz (SiO2)
Chalk
Calcite (CaCO3)
Chert
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Chert (Yellow/Tan variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert Arrowhead
Microcrystalline Quartz (SiO2)