Banded Agate (Jasper-Agate)
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a microcrystalline quartz) specimens identified by the Rock Identifier community.
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Riverstone Quartzite / Chalcedony Nugget
Silicon Dioxide (SiO2)
metamorphic
Quartzite Pebble
Quartzite (chiefly SiO2)
metamorphic
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Feldspar (specifically Orthoclase or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Fancy Jasper (Multicolor Agate/Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)3Si3O10(OH)2)
metamorphic
Chert (Quartz Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Conglomerate with Quartzite Pebbles
Clastic sedimentary rock (Conglomerate)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Field Stone/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2 inclusions)
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral
Chert / Flint
Chert (varieties include Flint)
Sedimentary
Chert (including Flint and Jasper variants)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Chert (Siliceous rock composed of microcrystalline Quartz, SiO2)
sedimentary
Chert (Green variety)
Microcrystalline Opaline/Quartz (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Tan or Buffer variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
Metamorphic
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Quartz
Quartz (SiO₂)
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Chert (and/or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)
igneous
Chert (Flint variety)
Chert (SiO2)
sedimentary
Jasper (likely Ocean Jasper or Variegated Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary