Smoky Quartz
Silicon Dioxide (SiO2)
mineral
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.
Seraphinite
Clinochlore (a variety of the chlorite group)
mineral
Ruby (Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Quartz (Milky/Opaque variety)
Silicon Dioxide (SiO2)
mineral
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
igneous
Chert (specifically Yellow/Brown Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
mineral
Chert (variant of Flint)
Chert (SiO2)
Sedimentary
Carnelian
Carnelian (SiO2 with Iron oxide impurities)
Mineral (Chalcedony variety)
Chert (Jasper/Chalcedony variety)
Silicon Dioxide (SiO2)
sedimentary
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Agate (specifically a Thunderegg/Agate Nodule)
Cryptocrystalline Quartz (SiO2)
mineral
Banded Agate (specifically Carnelian Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Red Jasper
Silicon dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Quartz (specifically Quartzite or Massive Quartz)
Silicon Dioxide (SiO2)
Mineral
Banded Onyx (Mexican Onyx / Travertine)
Calcite (CaCO3) - Banded Travertine
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Black Onyx
Cryptocrystalline Quartz (SiO2 with organic/iron impurities)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Jasper
Jasper (Silica/Silicon Dioxide, SiO2)
sedimentary
Chert (Common Opal/Agate inclusion)
Microcrystalline Quartz (SiO2)
sedimentary
Mother of Pearl and Onyx
Aragonite (Mother of Pearl) and Chalcedony (Onyx)
mineral
Banded Agate (specifically Lake Superior Agate or similar)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Banded Agate (specifically Lake Superior Agate type)
Silicon Dioxide (SiO2) - Microcrystalline Chalcedony
mineral
Agate (specifically Oco or Banded Agate)
Agate (a variety of Chalcedony), SiO2 (Silicon Dioxide)
mineral
Chert (specifically Black Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Green Quartz (Aventurine)
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Chert (Jasper/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (CaCO3)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Serpentine
Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4
metamorphic
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert (specifically Gray Chert)
Chert (SiO2)
sedimentary