Riverstone Jasper (Chert variant)
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral Variant
Browse mineral variant specimens identified by the Rock Identifier community.
Learn about Mineral Variant in the encyclopedia
View all →
Flint (Chert variant)
Microcrystalline Quartz (SiO2)
sedimentary
Flint (Chert variant)
Silica (SiO2) - Microcrystalline Quartz
sedimentary
Mica-rich granite or granitic pegmatite
Biotite granite; primarily quartz, feldspar, and biotite mica
igneous
Scoria
Scoria (Extrusive Volcanic Rock)
igneous
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Diorite (Spotted)
Plutonic Igneous Rock (Diorite)
igneous
Chalcedony (Common Opal variant or Agate)
Silicon Dioxide (SiO2)
mineral
Green Quartz (Prasiolite variant or Aventurine)
Silicon Dioxide (SiO2)
mineral
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (Lithic Wacke)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Micaceous/Feldspathic variant)
Arenite (specifically subarkose or lithic arenite)
sedimentary
Pegmatite (White Granite variant)
Pegmatitic Granite (Quartz and Feldspar rich)
igneous
Serpentine
Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe)3Si2O5(OH)4
metamorphic
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Basalt
Basalt
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Assorted Tumbled Gemstones
Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)
mineral
Chert (Jasper/Flint variant)
Microcrystalline Quartz (SiO2)
sedimentary
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
mineral
Chert (variously known as Flint)
Silicon Dioxide (SiO2)
sedimentary
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Chert (specifically Tan Chert or Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Pink Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Agate and Amethyst (Quartz variants)
Silicon Dioxide (SiO2) - Microcrystalline Quartz and Crystalline Quartz
mineral
Amethyst and Citrine (Quartz variants)
Silicon Dioxide (SiO2)
mineral
Ferruginous Conglomerate
Conglomerate with Iron-Oxide Matrix (SiO2 + Fe2O3/FeO(OH))
sedimentary
Ferruginous Sandstone (with Iron Oxide staining)
Clastic Sedimentary Rock - Quartz Arenite/Wacke
sedimentary
Meteorite
Chondrite / Iron-Nickel Meteorite
meteorite
Diorite (Dalmatian Stone variant)
Intermediate Phaneritic Igneous Rock
igneous
Diorite (Dalmatian Stone variant)
Phaneritic Intermediate Plutonic Rock (Diorite)
igneous
Chalk (Limestone variant)
Calcium Carbonate (CaCO3)
sedimentary
Chert (variant Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and Flint variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (variant Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Chalcedony variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Dragon Blood Jasper
Epidote with Red Piedmontite (Chalcedony/Quartz variant)
sedimentary
Granite (including Pegmatite variants)
Phaneritic Plutonic Rock (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Muscovite mica)
Igneous
Chert (specifically Yellow or Brown Chert / Jasper)
Silicon Dioxide (SiO2)
sedimentary