Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Category
Igneous And Metamorphic Derivative (Weathered)
Browse igneous and metamorphic derivative (weathered) specimens identified by the Rock Identifier community.
Ferruginous Quartz
Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions
mineral
Quartzite River Stone
Quartzite (primarily SiO2)
metamorphic
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
metamorphic
Quartz (Grain/Fragment)
Silicon Dioxide (SiO2)
mineral
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Chrysocolla in Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4' nH2O on Quartz/Feldspar matrix
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite (or Ferruginous Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
metamorphic
Quartzite (River Cobble)
Quartzite (dominant mineral: Quatrz, SiO2)
metamorphic
Quartzite (Quartz-rich Cobble)
Quartzite (SiO2)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Amethyst variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Vein Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (River Stone)
Silicon Dioxide (SiO2)
mineral
Quartzite Cobble
Meta-quartzite (SiO2)
metamorphic
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Citrine
Crystalline Quartz (SiO2) with iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Potassium Aluminum Silicate, KAlSi3O8
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Felsic Rock (K-Feldspar + Quartz + Plagioclase)
igneous
Banded Agate (Lace Agate)
Agate (Variety of Cryptocrystalline Quartz), SiO2
mineral
Basalt (Weathered Pebble)
Extrusive mafic igneous rock; minerals primarily Plagioclase feldspar and Pyroxene
igneous
Rough Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Smoky Quartz (with inclusions)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Rough Quartz)
Silicon Dioxide (SiO2)
mineral
Amphibolite
Amphibolite
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2 silicon dioxide)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Hypersthene
Enstatite (Hypersthene variety), (Mg,Fe)SiO3
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Smoky Quartz
Silicon Dioxide (SiO₂)
mineral