Pink Granite / Gneiss
Felsic Plutonic Rock (Granite) with Gneissic banding
igneous / metamorphic
Category
Mineral (Specifically A Variety Of Quartz)
Browse mineral (specifically a variety of quartz) specimens identified by the Rock Identifier community.
Chert (and/or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (mica)
Mineral (variety of Quartz)
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Carnelian
Carnelian (Silica, SiO2)
mineral
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Mineral
Fossil Coral
Coral Limestone (a type of biogenic sedimentary rock)
Sedimentary
Banded Gneiss
Gneiss (typically quartz, feldspar, mica, amphibole composition)
metamorphic
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite (SiO2 + Fe2O3)
igneous
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Obsidian (specifically Mahogany Obsidian)
Volcanic glass (high silica content, SiO2)
igneous
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Chert (specifically Flint or Common Opal variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Yellow/Brown Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Chert (or Flint)
Chert (a cryptocrystalline variety of quartz, SiO2)
sedimentary
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Mineral
Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)
Diorite (Igneous rock, intrusive, intermediate composition)
Igneous Rock
Dolerite (Diabase)
Dolerite / Diabase
igneous
Larimar
Pectolite (a variety of pectolite, NaCa2Si3O8(OH))
Mineral
Jasper with Iron Staining
Silicon Dioxide (SiO2) with impurities
sedimentary
Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)
Jasper, microcrystalline quartz (SiO₂)
Sedimentary Rock
Granite
Phaneritic high-silica plutonic rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (variety of Quartz)
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (variously known as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Black Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Green Aventurine (Propably a tumbled variety)
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
mineral
Yellow Jasper
Chalcedony (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Chert (Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar
mineral
Chert (specifically Red Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Banded Agate Geode (with Microcrystalline Quartz)
Silicon Dioxide (SiO2) - variety Chalcedony/Agate
mineral
Quartzite pebble
Quartzite (SiO2)
metamorphic
Jasper
Chalcedony (cryptocrystalline quartz), SiO2
Sedimentary
Amethyst (Chevron or Dream Amethyst variety)
Tectosilicate Silicon Dioxide (SiO2) with iron impurities
mineral