Greenstone / Graywacke
Metagraywacke (Chlorite-grade schistose rock)
metamorphic
Category
Sedimentary (Microcrystalline Quartz)
Browse sedimentary (microcrystalline quartz) specimens identified by the Rock Identifier community.
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Yellow Jasper
Jasper (Silica-rich Microcrystalline Quartz, SiO2 with Iron impurities)
sedimentary
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Dalmatian Stone
Dalmatian Jasper (a trade name for an igneous microcrystalline rock composed mostly of feldspar, quartz, and dravite)
igneous
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
mineral
Glauconitic Sandstone (Greensand pebble)
Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)
sedimentary
Chalcedony
Chalcedony (a microcrystalline variety of Quartz, SiO2)
Mineral
Agate
SiO2 (Silicon dioxide, cryptocrystalline quartz)
mineral
Chert (Jasper/Black Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Agate (specifically a small Chalcedony nodule)
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
sedimentary
Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
igneous
Yellow Jasper
Jasper (Silicon Dioxide, SiO2 plus various mineral impurities)
sedimentary
Quartzite river stone
Quartzite (SiO2)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or iron oxide inclusions
sedimentary
Jasper
Jasper (Silicon Dioxide) - SiO2
sedimentary
Chert (specifically Flint or Nodular Chert)
Silicon Dioxide (SiO2)
sedimentary
Dalmation Jasper (Dalmation Stone)
Perthitic feldspar-quartz-amphibole rock
igneous
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Yellow Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Chalcedony in Matrix
Silicon Dioxide (SiO2)
mineral
Graywacke with Quartz Veins
Argillaceous Sandstone (Graywacke)
sedimentary
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Chert (Quartz Variety)
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Jasper (specifically Bloodstone or Heliotrope variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary (chemically precipitated)
Chert (Flint)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Chert / Flint
Cryptocrystalline Quartz (Silicon Dioxide, SiO2)
sedimentary
Brown Chert or Ironstone
Cryptocrystalline Quartz (SiO2) with Iron Oxides
sedimentary
Chert (specifically Green Chert/Jasper)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Jasper (Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint)
SiO2 (predominantly microcrystalline or cryptocrystalline quartz)
Sedimentary rock
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Yellow Chert (Yellow Jasper)
Cryptocrystalline Quartz (SiO2) with Goethite/Limonite inclusions
sedimentary
Jasper Breccia
Brecciated Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Carnelian
Carnelian (Silicon Dioxide: SiO2)
mineral
Chalcedony (Carnelian Agate)
Cryptocrystalline quartz (SiO2) with Iron Oxide inclusions
sedimentary