White Topaz
Al2SiO4(F,OH)2 (Aluminium Silicate Fluoride Hydroxide)
mineral
Category
Mineral Health
Browse mineral health specimens identified by the Rock Identifier community.
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Yellow Quartz or Citrine Geode/Cluster
Silicon Dioxide (SiO2)
mineral
Quartz (Yellow/Citrine variety)
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Tumbled Clear Quartz and Citrine Points
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz (Stained Quartz)
Silicon Dioxide (SiO2) with secondary Iron Oxide inclusions (Limonite/Hematite)
mineral
Gneiss
Gneiss (pronounced 'nice')
Metamorphic Rock
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Stromatolite
Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)
sedimentary
Amazonite
Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)
mineral
Charoite
Charoite (K(Ca,Na)2Si4O10(OH,F)·nH2O)
metamorphic
Milky Quartz Chip
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Druzy Quartz Geode
Silicon Dioxide (SiO2)
mineral
Greenschist (Greenstone)
Greenschist (Metamorphic rock containing chlorite, actinolite, and epidote)
metamorphic
Tiffany Stone
Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)
mineral
Green Aventurine in Host Rock
Quartz (SiO2) with Fuchsite inclusions
mineral
Undetermined Due to Blur (Possible Flesh-Tone Mineral)
Unknown (Insufficient Visual Clarity)
Mineral
Gneiss
Gneiss
metamorphic
Marble
Metamorphosed Limestone (CaCO3)
metamorphic
Metal Alloy (Jewelry)
Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.
Man-made Material (jewelry, metal alloy)
Rose Quartz
SiO2 (Silicon Dioxide with trace inclusions of dumortierite)
mineral
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Amazonite
K(AlSi3O8) - Lead-bearing Microcline (Tectosilicate)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Prehnite
Prehnite Ca2Al2Si3O10(OH)2
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Basalt with Amygdules
Amygdaloidal Basalt
igneous
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Snowflake Obsidian
Spherulitic Obsidian (Amorphous Volcanic Glass with Cristobalite inclusions)
igneous
Granite Cobble
Granite (Phaneritic igneous rock)
igneous
Granite
Felsic Plutonic Rock
igneous
Gneiss (with Quartzite and Biotite)
Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)
metamorphic
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
igneous
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with various inclusions
mineral
Quartz (White/Milky Pebble)
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcite (CaCO3)
Mineral
Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Silicon Carbide (Carborundum)
Moissanite (SiC)
mineral
Granite
Phaneritic Plutonic Rock (primarily SiO2, Al2O3, K2O, Na2O)
igneous
Gneiss (Schistose)
Gneiss
metamorphic