Carnelian
Carnelian (Microcrystalline Quartz, SiO2 with Fe2O3 impurities)
Mineral
Category
Not A Rock (Synthetic Material)
Browse not a rock (synthetic material) specimens identified by the Rock Identifier community.
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
Mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with impurities of iron)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pyrite (on a metal substrate)
Iron Sulfide (FeS2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Chalcedony (likely carnelian or yellow agate)
Silicon Dioxide (SiO₂)
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Greenstone (Epidisite / Chlorite Schist)
Metabasalt (often contains Epidote Ca2Al2(Fe3+,Al)(SiO4)(Si2O7)O(OH) and Chlorite)
metamorphic
Dalmatian Stone
Dalmatian Jasper (actually a Peralkaline Igneous Rock)
igneous
Garnet (specifically Almandine or Pyrope)
Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)
mineral
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide impurities), formula: SiO2
mineral
Epidote-bearing Granite (Unakite-like)
Epidotized Granite
igneous
Conglomerate
Clastic sedimentary rock (Puddingstone)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Quartzite
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
![Amethyst (Quartz variety) (Amethyst [Silicon Dioxide (SiO2)]) — mineral](https://media.rockidentification.com/b9cee378-cbe9-4518-8022-2ff4232730ab-thumbnail.jpg)
Amethyst (Quartz variety)
Amethyst [Silicon Dioxide (SiO2)]
mineral
Picture Jasper
Silicified sedimentary or volcanic rock (primarily SiO2)
sedimentary
Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Agate Geode
Cryptocrystalline Quartz (SiO2)
mineral
Moonstone (Feldspar variety)
Orthoclase Feldspar (KAlSi3O8)
mineral
Jasper (Red/Brown Variety)
Jasper (Silicon Dioxide, SiO2 plus Iron Oxide impurities)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)
sedimentary
Chert (Flint Nodules)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Unakite (or Epidotized Granite)
Epidotized Granite (Composition: KAlSi3O8, Ca2(Al,Fe)3(SiO4)3(OH), SiO2)
metamorphic
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Granite Gneiss
High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)
metamorphic
Milky Quartz (Crystal Cluster)
Silicon Dioxide (SiO2) - Quartz Variety
mineral
Gneiss (Stream-worn Cobble)
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)
metamorphic
Dyed and Metallic Coated Agate Geode
Silicon Dioxide (SiO2) with titanium/gold vapor deposition coating
sedimentary (primary) with artificial modification
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Granite
Phaneritic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Limestone Breccia
Sedimentary Breccia (Calcareous)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)
igneous
Amethyst (Quartz)
Amethyst (SiO2 with iron impurities)
mineral
Auriferous Quartz (Gold-bearing Quartz)
Silicon Dioxide (SiO2) with Elemental Gold (Au)
mineral