Yellow Aventurine
Quartz (SiO2) with iron-bearing inclusions
mineral
Category
Mineral (Processed Alloy)
Browse mineral (processed alloy) specimens identified by the Rock Identifier community.
Cubic Zirconia (CZ)
Zirconium dioxide (ZrO2)
mineral
Lepidolite and Rubellite (Pink Tourmaline) in Quartz
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite) and Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite/Pink Tourmaline)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2
Mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Amygdaloidal Basalt
Basalt with secondary mineral infilling
igneous
River Pebble Gravel
Hydrothermally modified Clastic Sediment (mainly Quartzite and Chert)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary component
Greenstone
Greenschist
metamorphic
Tiger's Eye (Brown/Dark variety)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine Quartz / Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline (KAlSi3O8) with trace lead (Pb)
mineral
Tiger's Eye, Hematite, and Black Obsidian Bracelet
SiO2 (Tiger's Eye), Fe2O3 (Hematite), and 70-75% SiO2 (Obsidian)
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Botryoidal Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized Shark Tooth or Bone Fragment
Vertebrate Fossil (likely Carcharodon or similar genus)
fossil
Lepidolite in Pegmatite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite)
metamorphic
Sandstone (Ferruginous)
Arenite (Fe2O3 staining)
sedimentary
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite/Magnetite inclusions)
igneous
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Fossil Shark Tooth
Selachii (fossilized dentition)
fossil
Bivalve Fossil (Fossilized Shell)
Class Bivalvia (fossilized in Calcium Carbonate/Aragonite)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Blue Quartzite (Blue Aventurine)
Silicon Dioxide with Dumortierite/Crocidolite inclusions (SiO2)
metamorphic
Blue Quartzite (Aventurine)
Silicon Dioxide (SiO2) with Dumortierite or Crocidolite inclusions
metamorphic
Jasper (specifically Owyhee or Picture Jasper variety)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pyritic Quartzite
Metequartzite with FeS2 (Pyrite) inclusions
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert / Flint
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Quartz Vein / Quartz Matrix
Silicon Dioxide (SiO2)
mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)3O8
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)
Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)
gemstone
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gold-bearing Quartz
Lode Gold in Silicon Dioxide (SiO2)
mineral