Apache Tear
Obsidian (Hydrated Silica Rich Volcanic Glass)
igneous
Category
Anthropogenic Specimen (Man Made)
Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.
Blue Tiger's Eye (Hawk's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Tree Agate (or Moss Agate), faceted into a crystal tower
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Schorl (Black Tourmaline)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Ironstone Concretion / Limonite Node
Goethite and Limonite (FeO(OH) nH2O)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Sunstone (Orthoclase Feldspar variant)
Orthoclase (KAlSi3O8) with inclusions
mineral
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Dendritic Agate (Tumbled)
Silicon Dioxide (SiO2) with inclusions
mineral
Apache Tear
Obsidian (Hydrated Volcanic Glass) - SiO2 (with impurities)
igneous
Jasper (specifically Oolitic or Brecciated Jasper)
Silicon Dioxide (SiO₂)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Graphic Granite
Graphic Granite (Granitic Pegmatite), typically KAlSi3O8 (Feldspar) + SiO2 (Quartz)
igneous
Moonstone (Feldspar variety)
Orthoclase Feldspar (KAlSi3O8)
mineral
Malachite in Matrix
Copper Carbonate Hydroxide (Cu2CO3(OH)2)
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2 with impurities)
sedimentary
Amethyst
Silicon Dioxide (SiO2) containing Iron impurities
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Vesicular Basalt with Amygdules
Amygdaloidal Basalt
igneous
Morganite (Pink Beryl)
Beryllium aluminum silicate Be3Al2(SiO3)6
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz with Cyanobacteria fossile)
sedimentary
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Mineral
Nuummite
Orthoamphibole (mixture of Anthophyllite and Gedrite)
metamorphic
Blue Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of asbestiform silicates)
mineral
Azurite in Matrix
Azurite (Cu3(CO3)2(OH)2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron impurities
sedimentary
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide , SiO2)
igneous
Red Beryl
Bixbite (Be3Al2Si6O18 with Mn3+ ions)
mineral
Nuummite
Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)
metamorphic
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Apache Tear
Hydrated Obsidian (Volcanic Glass)
Igneous
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay inclusions
sedimentary
Chrysocolla in Cuprite (Sonora Sunrise)
Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) with Cu2O
mineral
Blue Lace Agate (Variety of Chalcedony)
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Green Aventurine
Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic