Chert (variations include Flint/Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert (with Lichen)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (lithic/greywacke variety)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Agate
Agatized Chalcedony (SiO2)
mineral
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
sedimentary
Moonstone
Orthoclase (KAlSi3O8), specifically the variety showing adularescence
mineral
Banded Agate
Cryptocrystalline Silica (SiO2)
mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint Nodules)
Cryptocrystalline Quartz (SiO2)
sedimentary
Ocean Jasper
Silicon dioxide with impurities (SiO2 + impurities)
sedimentary
Milky Quartz (Common Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Common Opal variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz (specifically Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Yellow Jasper
Chalcedony (SiO2) with iron oxide inclusions
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (variety of Quartz)
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
sedimentary
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Ferruginous Sandstone
Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Specular Hematite (Specularite)
Hematite (Iron(III) oxide) - Fe2O3
mineral
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert / Flint
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Amazonite
Microcline (KAlSi3O8)
mineral
Dalmatian Jasper (or Dalmatian Stone)
Dalmatian Stone (A peralkaline felsite composed of feldspar, quartz, and sodic amphibole)
igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Puddingstone
Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)
Sedimentary
Chert (Yellow or Brown Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Dragon Blood Jasper
Epidote with Red Piedmontite (Chalcedony/Quartz variant)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Flint (Chert)
Cryptocrystalline Quartz (SiO2)
sedimentary
Breciated Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Chert (specifically a weathered Chert nodule or fragment)
Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary