Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Category
Metamorphic Or Igneous (Context Dependent)
Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuscite inclusions
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Amazonite
Microcline (variety Amazonite) - K(AlSi3O8)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Tiger's Eye
Silicon Dioxide with inclusions (SiO2)
mineral
Amazonite
KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)
mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Tiger's Eye (Blue/Black variety, also known as Hawk's Eye)
Silicified Crocidolite (Silicon Dioxide with inclusions, SiO2)
metamorphic
Amazonite
Microline Feldspar (KAlSi3O8)
mineral
Agate
Silicon dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (Variety of Quartz)
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
mineral
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
mineral
Blue Tiger's Eye (Hawks Eye)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
mineral
Serpentinite (Serpentine Rock)
Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.
Metamorphic
Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Garnet (likely Almandine)
Almandine Garnet, Fe3Al2(SiO4)3
mineral
Serpentinite
Serpentinite
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
sedimentary
Banded Agate
Cryptocrystalline variety of Quartz (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Green Tourmaline
Elbaite - Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
mineral
Pink Thulite (in Pumice-like texture)
Pink Zoisite (Mn-bearing Zoisite), Ca2Al3(SiO4)3(OH)
metamorphic
White Agate (resembling Bone Chalcedony)
Cryptocrystalline Quartz (SiO2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite mica)
metamorphic
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Jadeite Jade
Sodium Aluminum Silicate (NaAlSi2O6)
metamorphic
Quartz / Quartzite
Silicon Dioxide (SiO2)
mineral / metamorphic
Aventurine and Amazonite
Silicon Dioxide (SiO2) with inclusions and Microcline (KAlSi3O8)
Mineral
Garden Quartz (Lodolite)
Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)
mineral
Blue Quartz (specifically Dumortierite Quartz)
SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic