Leopard Skin Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Category
Crystal
Browse crystal specimens identified by the Rock Identifier community.
Flower Agate
Chalcedony (SiO2) with Scolecite/Opaque inclusions
mineral
Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
igneous/sedimentary mixed (Orbicular Jasper)
Unakite
Unakite Epidosite (Granite with epidote and orthoclase)
metamorphic
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a nodule
sedimentary
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Tiger's Eye (Polished Point/Tower)
SiO2 (Silicon Dioxide) with included crocidolite fibers
Mineral (Metamorphic pseudomorph)
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Epidote in Matrix
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Snowflake Obsidian
Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)
igneous
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral
Yooperlite (Sodalite-bearing Syenite)
Sodalite-rich Syenite (Na8(Al6Si6O24)Cl2)
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Bixbyite on Rhyolite
Bixbyite (Mn2+,Fe3+)2O3
mineral
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Amazonite
K(AlSi3O8)
mineral
Basalt
Extrusive Mafic Igneous Rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar (Orthoclase/Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Milky Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Amazonite
Amazonite (K(AlSi3O8))
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
Mineral
Epidote
Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Carnelian (Banded Agate)
Carnelian Chalcedony (SiO2)
mineral
Peridot in Basalt
Olivine ((Mg, Fe)2SiO4) in Basalt
mineral
Granite and Igneous Mix
Phaneritic Felsic to Mafic Intrusive Rocks
igneous
Obsidian
Obsidian (Volcanic Glass, primarily SiO2)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral